1 Scope

NOTE This specification covers permanently installed interior luminaires and their integral components — the light source, optical system, driver, wiring, housing, and mounting hardware — for commercial, institutional, and industrial buildings. (1.1)

1.2 Luminaires and their components shall be listed and labeled by a Nationally Recognized Testing Laboratory, the complete luminaire to UL 1598 and the LED driver and associated electronic equipment to UL 8750.

1.3 Luminaires shall be installed in accordance with NFPA 70 (National Electrical Code) Article 410.

NOTE A luminaire is a complete lighting unit, not merely a lamp; its delivered performance depends on the interaction of the light source, the optical assembly, the thermal design, and the driver. (1.4)

NOTE Requirements in this standard are written around the performance of the finished luminaire as measured in accordance with the IES photometric methods, rather than around the rating of a bare light source. (1.5)

1.6 The Engineer shall specify what the luminaire must deliver into the space; the manufacturer is responsible for the internal design that achieves it.

1.7 Light-emitting diode (LED) sources are the assumed default throughout this standard.

NOTE LED is the dominant interior commercial light source in the current US market, is required or strongly favored by adopted energy codes, and is the only source for which the full suite of IES measurement and lifetime-projection methods applies. (1.7.1)

1.8 Where a project genuinely requires a non-LED source, the Engineer shall document the requirement and the applicable source-specific standards on the contract drawings; such cases are outside the assumed configuration of this standard.

1.9 This standard addresses emergency egress lighting only where it is integral to or directly associated with the general-illumination luminaire — battery-backup drivers, integral emergency LED arrays, and the listing of fixtures used on egress paths.

1.10 The egress lighting design itself, including illumination levels along the path of egress and the arrangement of emergency and exit luminaires, is governed by NFPA 101 (Life Safety Code) and the adopted building code, and shall be coordinated with Emergency And Standby PowerEmergency and Standby Power SystemsResolves to the current edition.sync/emergency-and-standby-power.

2 Referenced Standards

2.1 Equipment, materials, and installation shall comply with the latest adopted edition of the following standards and codes.

2.2 Where the contract documents, the adopted building or energy code, or a referenced standard conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.

2.3 Referenced Standards List

Standard	Title
UL 1598	Luminaires
UL 8750	Light Emitting Diode (LED) Equipment for Use in Lighting Products
UL 924	Emergency Lighting and Power Equipment
NFPA 70	National Electrical Code (Article 410 — Luminaires, Lampholders, and Lamps)
NFPA 101	Life Safety Code
ANSI C82.18	Light-Emitting Diode Drivers — Performance Characteristics
ANSI C82.77	Lighting Equipment — Harmonic Emission Limits — Related Power Quality Requirements
IES LM-79	Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products
IES LM-80	Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays, and Modules
IES TM-21	Projecting Long-Term Luminous Flux Maintenance of LED Light Sources
ANSI/IES TM-30	IES Method for Evaluating Light Source Color Rendition
ANSI C78.377	Specifications for the Chromaticity of Solid-State Lighting (SSL) Products
ANSI/ASHRAE/IES 90.1	Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings
IECC	International Energy Conservation Code (Commercial Provisions)
IEC 62386	Digital Addressable Lighting Interface (DALI)
IEC 60529	Degrees of Protection Provided by Enclosures (IP Code)
ASCE 7	Minimum Design Loads and Associated Criteria for Buildings and Other Structures

NOTE DesignLights Consortium (DLC) and ENERGY STAR are qualified-products programs, not consensus standards; where this standard references them, it references the program's published technical requirements as a procurement screen, not as a code requirement. (2.3.1)

3 Submittals

3.1 Action Submittals

3.1.1 Contractor shall submit the following for the Engineer's review prior to procurement.

3.1.2 A luminaire schedule alone is not a sufficient submittal; each fixture type shall be supported by the data needed to confirm it meets the specified performance.

Product data for each luminaire type, including dimensions, mounting method, finish, and a complete description of the light source, optics, and driver
An IES LM-79 photometric test report for each luminaire type, performed on the complete luminaire (not a bare source), reporting total luminaire lumens, input watts, luminaire efficacy, the photometric distribution, correlated color temperature (CCT), and color rendering metrics
LED package or module LM-80 data with the corresponding TM-21 lumen-maintenance projection supporting the specified rated life
Driver product data confirming input voltage range, output, dimming protocol, power factor, and total harmonic distortion
For emergency luminaires, UL 924 listing documentation and the emergency lumen output and duration

Action Submittals Requiredcheckbox

☑ Product data for each luminaire type

☑ LM-79 photometric test report (complete luminaire)

☑ LM-80 data with TM-21 lumen-maintenance projection

☑ Driver product data (voltage, dimming, power quality)

☑ UL 924 documentation for emergency luminaires

☐ Sample fixture(s) for review

3.2 Closeout Submittals

3.2.1 Contractor shall provide the following at substantial completion.

Operation and maintenance data for each luminaire and driver type, including replacement-part identification
Warranty documentation for luminaires, drivers, and emergency batteries
Record (as-built) luminaire schedule reflecting installed types and any approved substitutions
Documentation of emergency luminaire functional tests, including the date and result of the initial discharge test

Required Closeout Submittalscheckbox

☑ Operation and maintenance data (each luminaire and driver type)

☑ Warranty documentation (luminaires, drivers, emergency batteries)

☑ Record (as-built) luminaire schedule

☑ Emergency luminaire functional test documentation

4 Quality Assurance

4.1 Listing and Labeling

4.1.1 Every luminaire shall be listed and labeled to UL 1598 by a Nationally Recognized Testing Laboratory, and its LED driver and electronic components shall be listed to UL 8750.

4.1.2 Field-assembled or modified luminaires shall not be installed unless the modification is covered by the original listing or by a listed field-modification (retrofit) kit.

NOTE NEC Article 410 requires luminaires to be listed; an unlisted fixture is not acceptable regardless of its apparent quality. (4.1.3)

4.2 Photometric Substantiation

4.2.1 Luminaire performance shall be substantiated by an IES LM-79 test of the complete luminaire performed by a laboratory accredited for that method.

4.2.2 Manufacturer marketing figures, calculated values, or tests of a bare LED source shall not be accepted as substitutes.

NOTE The lumens, efficacy, and color a luminaire actually delivers reflect its optical and thermal losses, which a source-only figure ignores. (4.2.3)

4.3 Color Consistency

4.3.1 The initial color consistency tolerance shall be as indicated in the datasheet.

Color Consistency Tolerance (Initial)select

2-step MacAdam (tightest, premium spaces)

3-step MacAdam (commercial standard)

4-step MacAdam (utility / back-of-house)

4.3.2 The Contractor shall furnish all luminaires of a given type from production binned so that the color difference between any two fixtures of that type does not exceed the specified tolerance.

NOTE LEDs from a single product line vary in color point as manufactured; the manufacturer sorts (bins) them to control this variation. (4.3.3)

NOTE Color consistency is most visible on continuous runs, on wall washing, and where adjacent fixtures are seen together; a loose tolerance produces a visibly mismatched installation that no field adjustment can correct. (4.3.4)

NOTE A 3-step MacAdam tolerance is the commercial standard and is imperceptible to most observers in typical installations. (4.3.5)

4.3.6 A 2-step tolerance should be specified for premium retail, hospitality, healthcare exam, and gallery spaces where color uniformity is critical and is seen against neutral surfaces.

4.4 Qualified Products Screening

4.4.1 The qualified-products listing required of each luminaire shall be as indicated in the datasheet.

Qualified Products Listing Requiredradio

○ Not required

○ DLC Standard listed

○ DLC Premium listed

○ ENERGY STAR listed

NOTE The screening level follows from whether the project pursues utility incentives and from which program that utility references, so the field carries no default. (4.4.2)

NOTE Specifying a DLC- or ENERGY STAR-listed luminaire screens products against an independently verified set of efficacy, color, and warranty requirements and is frequently a prerequisite for utility rebates. (4.4.3)

4.4.4 A DLC or ENERGY STAR listing should be required where utility incentives are pursued.

4.4.5 The Engineer shall confirm the specific qualified-products list referenced by the relevant utility program.

5 Environmental and Service Conditions

NOTE A luminaire's rated performance and life assume an ambient operating temperature, because LED light output and lifetime both decline as junction temperature rises. (5.1)

5.2 The Engineer shall identify any location where the ambient temperature, enclosure, or atmosphere differs from ordinary conditioned interior space so that an appropriately rated luminaire is selected.

5.3 Ambient Operating Temperature

5.3.1 The maximum ambient operating temperature at which the luminaire's rated performance applies shall be as indicated in the datasheet.

Maximum Ambient Operating Temperaturerange

°C

254055

NOTE The three ratings correspond to conditioned interior space at 25°C, unconditioned or warm interior space at 40°C, and high-temperature locations such as attics, mechanical rooms, and kitchens at 55°C. (5.3.2)

5.3.3 Luminaire lumen and life ratings shall be valid at the specified ambient temperature.

5.3.4 Where luminaires are installed in unconditioned plenums, attics, mechanical rooms, or over cooking equipment, a higher ambient rating shall be specified and the manufacturer's lumen and life data at that temperature obtained.

NOTE Most interior commercial spaces are conditioned and the 25°C basis applies; a fixture rated only at 25°C will dim prematurely and fail early in a hot location. (5.3.5)

5.4 Location Moisture Rating

5.4.1 The NEC location classification for which each luminaire shall be listed shall be as indicated in the datasheet.

Location Classificationselect

Dry (ordinary interior)

Damp (covered exterior soffits, bathrooms, unheated spaces)

Wet (showers, car washes, direct moisture)

5.4.2 Where a numeric ingress rating is required in addition to the location listing, the minimum rating shall be as indicated in the datasheet.

Minimum Ingress Protection Ratingselect

Not specified (dry location)

IP44 (splash-resistant)

IP54 (dust-protected, splash-resistant)

IP65 (dust-tight, water jet)

IP66 (dust-tight, powerful water jet)

NOTE A numeric ingress rating is meaningful only where the location classification is damp or wet; a dry-location luminaire carries the "Not specified" value, and the field is left unanswered where the classification has not yet been made. (5.4.3)

5.4.4 Luminaires installed in damp or wet locations shall be listed for that location and shall be constructed so that water cannot enter or accumulate in wiring compartments, lampholders, or other electrical parts, in accordance with NEC 410.10.

5.4.5 Ingress protection shall be expressed as an IP rating per IEC 60529 where a numeric rating is required.

6 Light Source and Luminous Performance

6.1 Light Source Type

6.1.1 The light source construction shall be as indicated in the datasheet.

Light Sourceradio

○ LED (integral, non-replaceable array)

○ LED (replaceable module / light engine)

NOTE An integral LED array is the most common and lowest-cost construction and is appropriate where the luminaire is treated as a replaceable unit at end of life. (6.1.2)

6.1.3 A replaceable LED module should be specified where the luminaire body is architecturally significant or costly to replace, or where the Owner's maintenance program favors field-replaceable light engines over whole-fixture replacement.

6.1.4 The choice affects lifecycle cost more than first cost and shall be coordinated with the Owner's maintenance expectations.

6.2 Delivered Luminous Flux

6.2.1 The required delivered lumens per fixture shall be as indicated in the datasheet, confirmed by the point-by-point lighting calculations.

Delivered Luminaire Lumens (per fixture)range

lm

500800150025004000600080001200020000

Per drawings — luminaire schedule (deferred by default)

NOTE This value is the total luminaire output measured per IES LM-79, not the bare-source lumens. (6.2.2)

NOTE Specifying delivered lumens, rather than source lumens or input wattage, makes the requirement independent of how efficiently a given manufacturer's optics and thermal design convert source output into usable light in the space. (6.2.3)

6.3 Luminaire Efficacy

6.3.1 Luminaire efficacy shall be not less than the value indicated in the datasheet, measured per IES LM-79 on the complete luminaire.

Minimum Luminaire Efficacyrange

lm/W

90110120130140160

NOTE Luminaire efficacy is delivered luminaire lumens divided by input watts, measured per LM-79. (6.3.2)

NOTE A minimum efficacy requirement bounds the connected lighting load for a given light level and is what allows the design to meet the lighting power allowances of the adopted energy code. (6.3.3)

NOTE The default reflects current mainstream commercial LED performance; raising it reduces energy use but narrows the field of qualifying products, and a value set too high excludes legitimately compliant fixtures whose optics trade efficacy for glare control or distribution quality. (6.3.4)

7 Photometrics

7.1 Photometric Distribution

7.1.1 The luminaire shall produce the light distribution required to achieve the design illuminance and uniformity for its space, as established by the point-by-point calculations.

7.1.2 Distribution shall be as indicated on the luminaire schedule.

NOTE The distribution — not merely the lumen output — determines whether light reaches the work plane where it is needed and whether it produces glare; two luminaires of identical lumens and efficacy can perform very differently in the same room. (7.1.3)

7.2 Glare Control

7.2.1 The glare control class shall be as indicated in the datasheet.

Glare Control Classselect

Standard diffuse / prismatic lens

Low-glare optic to a stated UGR target

Indirect / direct-indirect distribution

NOTE Glare control is a per-space design decision — the same product is right for a warehouse and wrong for an open office — so the field carries no default. (7.2.2)

7.2.3 For spaces with computer screens, for healthcare, and for extended-occupancy office work, a low-glare optic or an indirect distribution should be specified to control discomfort glare, which a bare prismatic lens does not adequately address.

7.2.4 The unified glare rating (UGR) target appropriate to the space shall be as indicated on the luminaire schedule where glare control is critical.

8 Color Characteristics

8.1 Correlated Color Temperature

8.1.1 The correlated color temperature shall be as indicated in the datasheet.

Correlated Color Temperature (CCT)range

K

27003000350040005000

8.1.2 Correlated color temperature describes the warmth or coolness of the emitted white light and shall fall within the chromaticity tolerances of ANSI C78.377 for the nominal CCT specified.

NOTE CCT is a per-space appearance decision with no value that is correct across the building types this standard covers, so the field carries no default: 4000K is predominant for offices, schools, and healthcare because it reads as a clean neutral white, 3500K reads as a neutral suited to general commercial space, 2700K and 3000K are the warm temperatures that suit residential, hospitality, and retail, and 5000K is the cool temperature that suits industrial and high-acuity task spaces. (8.1.3)

8.1.4 A single CCT should be used throughout a contiguous space; mixing CCTs in one room produces an obvious and unwelcome inconsistency.

8.2 Color Rendering Index

8.2.1 The minimum color rendering index shall be as indicated in the datasheet.

Minimum Color Rendering Index (CRI, Ra)select

80 CRI (general commercial)

90 CRI (retail, healthcare, hospitality)

NOTE The color rendering index measures how faithfully a source renders a set of reference colors relative to a reference illuminant. (8.2.2)

NOTE A minimum CRI of 80 is the general commercial baseline and is acceptable for most offices, corridors, and back-of-house areas. (8.2.3)

8.2.4 A minimum CRI of 90 should be specified for retail, healthcare examination, hospitality, and any space where accurate appearance of merchandise, skin tone, or finishes matters, recognizing that higher-CRI LEDs typically deliver fewer lumens per watt.

8.3 Deep Red Rendering

8.3.1 The minimum R9 value shall be as indicated in the datasheet.

Minimum R9 (Saturated Red Rendering)select

Not specified

R9 ≥ 0

R9 ≥ 50 (healthcare, retail, food)

NOTE The general CRI value can mask poor rendering of saturated red, which is reported separately as R9. (8.3.2)

8.3.3 Skin tones, food, and many retail goods depend on red rendering, so an R9 minimum should be specified for healthcare, food service, and premium retail even where the overall CRI is otherwise acceptable.

8.3.4 Where the project uses the ANSI/IES TM-30 method instead of CRI, the fidelity index (Rf) and gamut index (Rg) targets shall be as indicated on the luminaire schedule.

NOTE TM-30 provides a more complete description of color rendition than CRI alone. (8.3.5)

9 Lumen Maintenance and Rated Life

NOTE LEDs do not fail abruptly; they fade. (9.1)

NOTE Rated life for an LED luminaire is defined as the point at which output has declined to a stated fraction of its initial value, commonly expressed as an Lxx figure (for example, L70 is the time to reach 70 percent of initial output). (9.2)

9.3 This projection shall be derived from LM-80 source data extrapolated by the TM-21 method.

9.4 A manufacturer's bare hour rating that is not supported by LM-80/TM-21 data shall not be accepted.

9.5 Rated Lumen Maintenance Life

9.5.1 The rated lumen maintenance life shall be as indicated in the datasheet, substantiated by LM-80 data extrapolated per TM-21.

Rated Lumen Maintenance Lifeselect

L70 ≥ 50,000 hours

L70 ≥ 60,000 hours

L70 ≥ 100,000 hours

NOTE An L70 rating of at least 50,000 hours is the mainstream commercial requirement and corresponds to many years of typical operation. (9.5.2)

9.5.3 A longer rated life should be specified where access for relamping is difficult or where the Owner's lifecycle policy justifies the premium.

9.5.4 The figure shall always be stated as an Lxx value supported by TM-21 projection, never as an unqualified hour count.

10 Electrical and Drivers

10.1 System Voltage

10.1.1 The luminaire operating voltage shall be as indicated in the datasheet and shall match the branch-circuit voltage serving the fixture.

Luminaire Operating Voltageselect

120V

277V

347V

120-277V universal-voltage driver

NOTE A universal-voltage (120–277V) driver is the practical default for commercial interior work because it accepts both common US branch-circuit voltages without re-stocking voltage-specific fixtures, simplifying procurement and field changes. (10.1.2)

NOTE The 347V option applies to systems served at 347/600V, which are encountered in some Canadian and large-industrial installations; a 347V driver is a distinct product from the 120–277V universal driver. (10.1.3)

10.1.4 A single-voltage driver may be specified where it offers a cost or performance advantage and the branch-circuit voltage is fixed and known.

10.2 LED Driver Performance

10.2.1 The LED driver shall comply with the performance characteristics of ANSI C82.18 and shall be listed to UL 8750.

NOTE The driver is the component most likely to fail over the luminaire's life, so its quality governs the reliability of the installation more than any other single part. (10.2.2)

10.2.3 Driver output shall match the LED load it serves, and constant-current and constant-voltage drivers shall not be interchanged.

10.3 Power Factor

10.3.1 Driver power factor shall be not less than the value indicated in the datasheet.

Minimum Driver Power Factorrange

power factor

0.90.99

Default: 0.9 power factor

10.3.2 A high power factor reduces the apparent power drawn by the lighting load and is required by energy codes for most commercial luminaires.

NOTE A minimum power factor of 0.90 is the standard commercial requirement; specifying a higher value yields diminishing benefit and may limit product selection. (10.3.3)

10.4 Total Harmonic Distortion

10.4.1 Driver input current THD shall not exceed the value indicated in the datasheet, measured per ANSI C82.77.

Maximum Driver Total Harmonic Distortion (THD)range

%

1020

Default: 20 %

NOTE LED drivers are nonlinear loads and inject harmonic current onto the branch circuit; excessive harmonics overload neutrals and transformers and distort the voltage waveform. (10.4.2)

10.4.3 A maximum of 20 percent is the common commercial limit; a tighter limit should be specified where a large connected lighting load shares transformers or neutrals with sensitive equipment.

11 Controls and Dimming

NOTE The fixture-level dimming interface is specified here because it is integral to the luminaire and its driver; the building-wide control system, sensors, and control intent are a separate scope coordinated under Lighting ControlsLighting ControlsResolves to the current edition.sync/lighting-controls. (11.1)

NOTE Energy codes (ANSI/ASHRAE/IES 90.1 and the IECC) require that most interior lighting be controllable and dimmable, so a non-dimming driver is the exception rather than the rule. (11.2)

11.3 Dimming Capability

11.3.1 Whether the luminaire is dimmable shall be as indicated in the datasheet.

Dimming Capabilityradio

● Dimmable

○ Non-dimming, on/off switching

11.3.2 Most interior commercial luminaires shall be dimmable to satisfy energy-code control requirements and to support occupant and daylight-response control.

11.3.3 A non-dimming driver may be used only in spaces where the energy code permits on/off control and dimming serves no purpose, such as certain back-of-house and storage areas.

11.4 Dimming Protocol

11.4.1 The dimming protocol at the luminaire shall be as indicated in the datasheet.

Dimming Protocolselect

0-10V analog

DALI / DALI-2 (IEC 62386)

Phase-cut (forward/reverse)

Integral wireless control

NOTE The 0–10V analog protocol is the default for commercial interior LED luminaires: it is simple, low-cost, and universally supported, using a low-voltage DC control pair separate from the line wiring. (11.4.2)

11.4.3 DALI (IEC 62386) should be specified where individual addressable control, fixture grouping in software, or driver feedback and diagnostics are required, as in tunable or reconfigurable open offices.

11.4.4 Phase-cut dimming may be used where the luminaire is controlled from an existing line-voltage wall dimmer, but it is more prone to flicker and dimmer-incompatibility than 0–10V or DALI and is not preferred for new commercial work.

11.5 Minimum Dimming Level

11.5.1 The driver shall dim smoothly to not more than the minimum level indicated in the datasheet.

Minimum Dimming Levelrange

percent of full output

0.11510

NOTE The deep end of the range is application-driven: 5 percent suits offices, conference rooms, and hospitality; 1 percent suits theaters, lecture halls, and premium hospitality; and 0.1 percent is a specialty theatrical selection. (11.5.2)

NOTE The minimum dimming level is the lowest output the driver can reach smoothly without flicker or dropout. (11.5.3)

NOTE A 10 percent minimum is adequate for general commercial spaces. (11.5.4)

11.5.5 A deeper minimum of 5 percent or 1 percent should be specified for conference rooms, auditoria, and hospitality where low-light scenes are expected.

11.5.6 The driver and the control system shall be confirmed compatible at the specified low end, because not all 0–10V drivers dim smoothly to deep levels.

11.6 Color Tuning

11.6.1 The color tuning behavior of the luminaire shall be as indicated in the datasheet.

Color Tuningradio

● Fixed CCT

○ Tunable white (warm-to-cool dim)

○ Warm-dim (CCT lowers with dimming)

NOTE A fixed CCT is appropriate for the large majority of commercial spaces and is the most reliable and economical choice. (11.6.2)

11.6.3 Tunable white should be specified where the space serves varied uses or supports circadian lighting objectives, such as in healthcare, education, and senior living; warm-dim luminaires that shift warmer as they dim suit hospitality and residential-feel spaces.

11.6.4 Color-tunable luminaires require a control system capable of the additional channels and shall be coordinated with Lighting ControlsLighting ControlsResolves to the current edition.sync/lighting-controls.

12 Construction and Mounting

12.1 Luminaire Mounting Type

12.1.1 The mounting type of each luminaire shall be as indicated in the datasheet.

Luminaire Mounting Typeselect

Recessed troffer (grid ceiling)

Recessed downlight

Recessed linear (grid or drywall)

Surface mounted

Pendant / suspended

Wall mounted

Per drawings — luminaire schedule (deferred by default)

12.1.2 The mounting type shall be coordinated with the ceiling system and structure shown on the reflected ceiling plan.

NOTE Recessed troffers suit grid ceilings; recessed downlights and linear fixtures may be grid- or drywall-mounted; pendant and surface fixtures suit exposed-structure and open-plenum ceilings. (12.1.3)

12.1.4 The selected type shall be compatible with the ceiling construction, plenum depth, and any fire-rated assembly into which it is installed.

12.2 Housing Construction

12.2.1 The luminaire housing shall be of corrosion-resistant material appropriate to its location — typically die-formed steel or extruded aluminum for interior fixtures — finished to resist handling and cleaning over the life of the installation.

12.2.2 The housing shall provide the thermal mass and heat-sinking required to keep the LED junction temperature within the range that supports the rated life.

NOTE Inadequate thermal design is the most common cause of premature LED dimming and failure. (12.2.3)

12.3 Lens and Diffuser

12.3.1 The lens or diffuser type shall be as indicated in the datasheet.

Lens / Diffuser Typeselect

Frosted / opal acrylic diffuser

Prismatic acrylic lens

Microprismatic low-glare lens

Polycarbonate (impact-resistant)

Open / louvered (no lens)

12.3.2 Polycarbonate lenses should be specified where impact resistance is required, such as in gymnasiums and detention areas, recognizing that polycarbonate yellows faster than acrylic under UV and heat.

NOTE Microprismatic lenses provide glare control for screen-based work. (12.3.3)

12.3.4 The lens material and texture interact with the optic to set both the glare performance and the appearance of the fixture and shall be coordinated with the photometric distribution requirement.

12.4 Ceiling Recess Thermal Rating

12.4.1 The insulation contact rating of recessed luminaires shall be as indicated in the datasheet.

Recessed Insulation Contact Ratingradio

● IC-rated (insulation contact permitted)

○ Non-IC (clearance required per NEC 410.116)

12.4.2 Recessed luminaires installed in contact with, or covered by, thermal insulation shall be listed and marked as suitable for that condition, in accordance with NEC 410.116.

12.4.3 A recessed fixture not so listed shall be installed with the clearance from combustible material and insulation required by NEC 410.116.

NOTE Trapped heat around a non-IC-rated fixture is a fire hazard and will also shorten LED life. (12.4.4)

12.5 Seismic and Suspended-Ceiling Support

12.5.1 Whether seismic support of luminaires is required shall be as indicated in the datasheet.

Seismic Support Requiredradio

○ Not required

○ Required per ASCE 7 / adopted building code

Per drawings — structural drawings (deferred by default)

NOTE The Seismic Design Category is established by the project's structural design; the lighting scope adopts it rather than setting it. (12.5.2)

12.5.3 Where required by the adopted building code, luminaires in suspended ceilings shall be independently supported and seismically restrained per ASCE 7, and shall not rely solely on the ceiling grid for support.

12.5.4 Independent support wires and the connection of the luminaire to structure shall be as detailed on the contract documents.

NOTE This requirement is frequently overlooked and is a common inspection finding in seismic regions. (12.5.5)

13 Emergency Egress Lighting

13.1 Where a general-illumination luminaire is designated to provide emergency egress illumination, it shall remain operable on loss of normal power for the duration required by NFPA 101 and the adopted building code.

13.2 Emergency lighting equipment, including integral battery backup, shall be listed to UL 924.

13.3 The illumination levels and arrangement of the egress path are a design responsibility outside this standard and shall be coordinated with Emergency And Standby PowerEmergency and Standby Power SystemsResolves to the current edition.sync/emergency-and-standby-power.

13.4 Emergency Power Source

13.4.1 The emergency power source serving the luminaire shall be as indicated in the datasheet.

Emergency Power Sourceselect

None — luminaire has no emergency function

Integral battery / emergency LED driver (UL 924)

Central inverter circuit

Generator-backed emergency branch circuit

13.4.2 An integral battery backup driver is the simplest and most common means of making an individual luminaire an emergency fixture and is appropriate where a small number of fixtures must be backed up.

13.4.3 A central inverter or a generator-backed emergency branch circuit should be specified where many emergency luminaires are required, because centralized backup is easier to test and maintain than dozens of individual batteries.

13.4.4 The choice shall be coordinated with the emergency power system design.

13.5 Emergency Output and Duration

13.5.1 The minimum emergency operating duration shall be as indicated in the datasheet.

Minimum Emergency Operating Durationselect

90 minutes (code minimum)

120 minutes

13.5.2 Emergency luminaires shall deliver the lumen output required to maintain the egress illumination level for the specified duration; 90 minutes is the code minimum under NFPA 101.

13.5.3 The emergency lumen output of a battery-backup luminaire is typically a fraction of its normal output and shall be confirmed adequate for the egress design rather than assumed equal to the full-power rating.

13.6 Self-Test and Self-Diagnostics

13.6.1 The self-test capability of emergency luminaires shall be as indicated in the datasheet.

Emergency Self-Test / Self-Diagnosticsradio

○ Manual test only

● Self-testing / self-diagnostic per UL 924

NOTE A self-testing, self-diagnostic emergency luminaire automatically performs the periodic functional and duration tests that NFPA 101 requires and signals a fault, removing the burden of manual monthly and annual testing from the Owner's staff. (13.6.2)

13.6.3 Self-testing should be specified for all but the smallest installations, because manual testing of distributed battery units is labor-intensive and frequently neglected, leaving non-functional emergency lighting undetected until an actual outage.

14 Testing

14.1 Functional Verification

14.1.1 The Contractor shall energize and operate every luminaire after installation and confirm that each fixture illuminates, dims smoothly across its specified range without flicker, and responds correctly to its control.

14.1.2 The Contractor shall replace any fixture that flickers, fails, or exhibits a visible color mismatch with its neighbors.

14.2 Emergency Lighting Discharge Test

14.2.1 Each emergency luminaire shall be tested by simulating a loss of normal power and confirming that the emergency source illuminates the fixture for the full required duration, in accordance with NFPA 101.

14.2.2 The date and result of this initial discharge test shall be recorded and included in the closeout submittals.

14.2.3 For self-testing luminaires, the initial automatic test result shall be confirmed and recorded.

14.3 Illuminance Verification

14.3.1 Whether field illuminance verification is required shall be as indicated in the datasheet.

Field Illuminance Verificationradio

● Not required

○ Required at representative spaces

14.3.2 Where specified, the Contractor shall measure maintained illuminance at representative locations with a calibrated meter and confirm the measured values meet the design illuminance shown on the drawings.

14.3.3 Field illuminance verification should be required for task-critical spaces such as healthcare, laboratories, and sports lighting, where a shortfall has functional consequences.

15 Installation

15.1 Coordination with Ceiling and Structure

15.1.1 The Contractor shall coordinate luminaire locations with the architectural reflected ceiling plan and with mechanical diffusers, sprinkler heads, structure, and other ceiling-mounted devices before rough-in, so that fixtures are installed straight, aligned, and in the locations shown.

15.1.2 Luminaires shall be installed level and aligned, with continuous runs forming straight, gap-consistent lines.

15.2 Connection

15.2.1 Luminaires shall be connected in accordance with NFPA 70 Article 410 and the wiring methods of Conductors And CablesConductors and CablesResolves to the current edition.sync/conductors-and-cables and Raceways And ConduitRaceways and ConduitResolves to the current edition.sync/raceways-and-conduit.

15.2.2 Recessed and concealed luminaires shall be wired with the conductor type and temperature rating required by the fixture marking, because conductors in the fixture's thermal zone must withstand its operating temperature.

15.2.3 Equipment grounding shall be provided to every luminaire per Grounding And BondingGrounding and Bonding for Electrical SystemsResolves to the current edition.sync/grounding-and-bonding.

15.3 Support

15.3.1 Each luminaire shall be supported independently of the wiring connected to it and by a means adequate for its weight, in accordance with NEC 410.36.

15.3.2 Fixtures in suspended ceilings shall be secured to the ceiling framing and, where required, independently supported from structure; the wiring whip and the ceiling grid shall not serve as the sole support.

15.4 Protection of Finishes

15.4.1 Lenses, reflectors, and finished surfaces shall be protected from construction dust and damage and shall not be installed, or shall be kept covered, until the space is clean.

15.4.2 Reflectors and diffusers handled with bare hands shall be cleaned before final acceptance, because fingerprints and dust on optical surfaces permanently degrade light output and appearance.

16 Delivery, Storage, and Handling

16.1 Luminaires shall be delivered in the manufacturer's original packaging with listing marks intact and shall be stored indoors in a clean, dry location protected from moisture, dust, and physical damage until installed.

16.2 Luminaires with integral batteries shall be stored within the battery manufacturer's temperature limits, and batteries shall not be left fully discharged for extended periods, because deep discharge and temperature extremes permanently reduce battery capacity before the fixture is ever placed in service.

17 Warranty

17.1 The luminaire warranty period shall be as indicated in the datasheet.

Luminaire Warranty Periodselect

5 years from substantial completion

7 years from substantial completion

10 years from substantial completion

17.2 Where integral-battery emergency luminaires are provided, the battery warranty period shall be as indicated in the datasheet.

Emergency Battery Warrantyselect

Not applicable (no integral-battery emergency luminaires)

1 year full, prorated thereafter

5 years from substantial completion

17.3 The luminaire, including its LED arrays and driver, shall be warranted against defects in materials and workmanship and against lumen depreciation in excess of the rated lumen maintenance for the warranty period.

NOTE A 5-year warranty is the mainstream commercial standard and is a DLC qualification threshold; a longer warranty should be specified where the rated life is long and field access for replacement is difficult. (17.4)

17.5 Emergency battery packs have a shorter service life than the luminaires they back up and shall carry a defined warranty.

NOTE The battery warranty is stated separately from the luminaire warranty because batteries are a wear item that will require replacement within the life of the fixture. (17.6)

18 Spare Parts

18.1 Spare luminaires and components shall be furnished as indicated in the datasheet.

Spare Luminaires / Componentscheckbox

☐ Spare lenses/diffusers (per type)

☐ Spare LED modules (replaceable-module fixtures)

☑ Spare drivers (per type)

☐ Spare complete luminaires (each major type)

☐ Spare emergency battery packs

18.2 The Contractor shall furnish spare components matching the installed types so the Owner can address failures without a long procurement lead time.

NOTE Spare drivers are the highest-value spare because the driver is the most failure-prone component; spare complete luminaires of each major type should be furnished where the product line may be discontinued or where color binning must be matched to the original installation. (18.3)