Lighting Handbook: Codes, OSHA Minimums, and ADA Rules

The legal requirements for lighting in the United States come from a patchwork of federal, state, and local rules covering what bulbs can be sold, how fixtures must be wired, how bright a workplace or exit path has to be, how much light may spill onto a neighbor’s property, and how spent lamps and old ballasts must be thrown away. Get one of these wrong and the consequences range from a failed building inspection to OSHA penalties above $165,000 per violation to a private nuisance suit from next door. The sections below walk through the rules most property owners, employers, and installers actually run into.

Home Wiring and Fixture Rules

Residential lighting installations are governed by the National Electrical Code, published by NFPA and enforced in every state, though the edition in force varies by jurisdiction.¹ The core safety principles are consistent across editions: lighting circuits must be properly sized, grounded, and protected against shock and fire hazards.

Ground-fault circuit interrupter (GFCI) protection is one of the most important rules. Outdoor lighting circuits and fixtures in wet or damp locations need GFCI protection so power cuts instantly if current leaks through water or a damaged fixture. Most jurisdictions also require GFCI protection in bathrooms, kitchens, garages, and unfinished basements.

Recessed Lighting Clearances

Recessed fixtures run hot, and the NEC splits them into two categories based on insulation contact rating. A non-IC-rated fixture must sit at least 13 millimeters (about half an inch) from combustible materials, and thermal insulation cannot be placed within 75 millimeters (roughly three inches) of the fixture housing. IC-rated fixtures are designed to safely touch insulation and combustible materials.² If insulation contacts a non-IC-rated fixture, the trapped heat has nowhere to go, which is a real fire risk.³

Landlord Obligations

If you rent out residential property, lighting maintenance falls under the implied warranty of habitability recognized in most states. Landlords must keep electrical systems in working order, replace burned-out common-area lighting, maintain exterior safety lights, and repair electrical defects. A tenant living with broken hallway lights or a malfunctioning porch fixture may have grounds to withhold rent or pursue code enforcement, depending on the jurisdiction.

Which Bulbs You Can Legally Buy

Since July 25, 2022, federal law has prohibited the sale of any general service lamp that fails to produce at least 45 lumens per watt.⁴ That standard effectively eliminates traditional incandescents, which typically produce 12 to 15 lumens per watt. To check a bulb, divide its total lumen output by its wattage; if the result is below 45 and the bulb doesn’t fall into a narrow exclusion like certain appliance or specialty bulbs, it can’t legally be sold.

The Department of Energy monitors the market and retailers caught selling noncompliant lamps face penalties. A second, stricter round of standards takes effect on July 25, 2028, imposing higher efficacy requirements on LED and compact fluorescent lamps.⁴ If you are planning a retrofit or stocking inventory, confirm every lamp meets the current threshold before buying in bulk.

Energy Codes for New Construction and Renovations

Residential energy codes have tightened. The 2012 International Energy Conservation Code required at least 75% of permanently installed lighting to use high-efficacy sources like LEDs or compact fluorescents.⁵ The 2021 edition raised that to all permanently installed lighting fixtures (except kitchen appliance lights).⁶ Not every jurisdiction has adopted the latest edition, so confirm which version your local building department enforces. Missing the applicable energy code can hold up your final inspection certificate.

Commercial buildings have an additional layer. The IECC requires automatic lighting controls in commercial spaces, which in practice means occupancy sensors that shut lights off when a room is empty and daylight-responsive controls that dim or turn off electric lights when enough natural light is present.⁷ A building inspector will verify the controls are installed and working before issuing an occupancy permit.

Outdoor Lighting, Neighbors, and Nuisance Claims

Local zoning ordinances regulate outdoor lighting to limit trespass onto neighboring property, glare that impairs drivers and pedestrians, and sky glow. Many jurisdictions require full-cutoff fixtures: the housing is built so light exits only through the bottom, directed downward rather than scattering sideways or up.

Brightness limits at the property line are common and typically measured in foot-candles. The specific threshold varies, but residential zones generally restrict light at the boundary to somewhere between 0.1 and 0.5 foot-candles. A zoning violation usually results in a notice to correct the problem by adding shielding, repositioning the fixture, or reducing wattage.

Separately, a neighbor affected by your lighting can file a civil claim for private nuisance when artificial light unreasonably interferes with the use and enjoyment of their land. A successful claim can result in a court order to modify the lighting and, in some cases, monetary damages. Courts weigh the intensity of the light, how long it stays on, the character of the neighborhood, and whether you took any steps to reduce the impact. A single motion-activated security light is unlikely to support a nuisance claim. A bank of unshielded floodlights aimed at a bedroom window almost certainly would.

Workplace Illumination: OSHA Minimums

OSHA sets minimum illumination levels in foot-candles for workplaces, and they are enforceable. On construction sites, Table D-3 sets these floors:

30 foot-candles for first-aid stations, infirmaries, and offices
10 foot-candles for plant and shop areas, including mechanical rooms, carpenter shops, and locker rooms
5 foot-candles for general construction areas, indoor warehouses, corridors, hallways, and exitways
3 foot-candles for concrete placement, excavation, active storage areas, and loading platforms

⁸

Shipyard and general industry workplaces have their own tables with different thresholds, so check the standard that applies to your industry.⁹ OSHA treats inadequate lighting as a safety violation. As of January 2025, a serious violation carries a maximum penalty of $16,550 per instance, and willful or repeated violations can reach $165,514 each. The amounts are adjusted annually for inflation.¹⁰

ADA Rules for Switches and Wall Fixtures

The Americans with Disabilities Act imposes two lighting-related requirements that catch many building owners off guard. Light switches and dimmer controls, like all operable parts, must be reachable from a wheelchair. The 2010 ADA Standards cap the maximum height at 48 inches above the finished floor for both forward and side reach.¹¹

Wall-mounted fixtures like sconces cannot protrude more than four inches from the wall if their bottom edge sits between 27 and 80 inches above the floor. The rule protects people with visual impairments who use canes: a cane detects objects at ground level but not a sconce projecting at head height.¹² Fixtures mounted below 27 inches or recessed into the wall are exempt.

Emergency and Exit Lighting

Emergency lighting and illuminated exit signs are required in virtually every commercial, industrial, and multifamily residential building. The governing standards come primarily from NFPA 101 (the Life Safety Code) and OSHA’s exit route regulations, with local fire codes sometimes layering on additional requirements.

Emergency lighting must activate automatically when normal power fails and sustain illumination for at least 90 minutes. During that window the system must deliver an average of at least 1 foot-candle along the egress path at floor level, with no point falling below 0.1 foot-candle. Exit signs must be illuminated to a surface brightness of at least 5 foot-candles by a reliable source and be distinctive in color. Self-luminous or electroluminescent signs are an alternative if they meet a minimum luminance of 0.06 footlamberts.¹³

Installing compliant equipment is only half the obligation. Fire codes require ongoing testing. The standard schedule calls for a brief functional test at least once a month, typically 30 seconds, plus an annual test where the system runs on battery power for the full 90 minutes. Written records of every test must be kept on file for the fire marshal or your insurer. Skipping these tests is one of the most common fire code violations and one of the easiest to avoid.

Listed Fixtures and Recalled Products

Before a lighting fixture can legally be installed in most jurisdictions, it needs a mark from a Nationally Recognized Testing Laboratory. The NEC requires that electrical products be tested, evaluated, and listed by a qualified testing laboratory.² The most familiar marks are UL (Underwriters Laboratories) and ETL (Intertek), though OSHA recognizes more than a dozen testing organizations. A fixture without an NRTL listing will fail electrical inspection, and installing one creates liability if an electrical fire follows.

The Consumer Product Safety Commission regularly recalls lighting fixtures for fire hazards, shock risks, and other defects. Selling a recalled product is a federal violation under the Consumer Product Safety Act, and the prohibition reaches resellers, not just original manufacturers.¹⁴ If a fixture already installed in your building has been recalled, the manufacturer is typically required to offer a free repair or replacement. Leaving a defective fixture in service exposes you to significant liability if someone is injured or a fire starts.

Energy Star certification is a separate matter. The label is not legally required, but it often functions as a gatekeeper for financial incentives: state and utility rebate programs frequently require Energy Star certification as a condition for lighting rebates.¹⁵

Disposing of Fluorescent Lamps and Old Ballasts

Older lighting systems contain materials that are illegal to throw in the trash. Two categories cause most of the regulatory trouble: mercury-containing lamps and PCB-containing ballasts.

Fluorescent and HID Lamps

Fluorescent tubes, compact fluorescents, and certain HID lamps contain mercury, which makes them hazardous waste when discarded. Federal regulations under 40 CFR Part 273 allow these lamps to be managed as “universal waste,” a streamlined category that reduces paperwork. You can store spent lamps for up to one year before shipping them to a permitted recycling or disposal facility. Each lamp or its container must be labeled “Universal Waste—Lamp(s)” or similar language, and broken lamps must immediately be placed in a closed, structurally sound container to prevent mercury releases.¹⁶ Universal waste does not count toward your hazardous waste generator status, and a hazardous waste manifest is not required to ship it.¹⁷ Some states impose stricter requirements than the federal baseline, so confirm your state’s rules before relying on the federal framework alone.

PCB-Containing Ballasts

Fluorescent light ballasts manufactured before 1979 may contain polychlorinated biphenyls (PCBs), which the EPA banned due to their toxicity. Ballasts made between 1979 and 1998 that are PCB-free carry a “No PCBs” label. If a ballast lacks that label, the EPA advises treating it as if it contains PCBs.¹⁸

A leaking PCB ballast is unauthorized disposal under federal regulations and must be removed and sent to an approved facility.¹⁹ Once taken out of service, PCB ballasts must reach an approved disposal facility within nine months and be fully disposed of within one year. Anyone handling suspected PCB ballasts should wear chemical-resistant gloves, protective clothing, and work with adequate ventilation. The most efficient approach is to remove PCB ballasts as part of a full lighting retrofit, eliminating the hazard while upgrading to compliant, efficient fixtures.¹⁸

1
NFPA. NEC Enforcement Maps
2
UpCodes. NFPA 70 – 410.116 Clearance and Installation
3
Building America Solution Center. Insulating and Air Sealing Existing Non-ICAT Recessed Lights
4
eCFR. 10 CFR 430.32 – Energy and Water Conservation Standards
5
Building Energy Codes Program. What Are the Lighting Requirements for Residences?
6
ICC. 2021 IECC Chapter 4 RE Residential Energy Efficiency
7
Building Energy Codes Program. 2018 IECC Commercial Electrical Power and Lighting Systems
8
eCFR. 29 CFR 1926.56 – Illumination
9
Occupational Safety and Health Administration. 29 CFR 1915.82 – Lighting
10
Occupational Safety and Health Administration. OSHA Penalties
11
ADA.gov. 2010 ADA Standards for Accessible Design
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U.S. Access Board. Chapter 3: Protruding Objects
13
Occupational Safety and Health Administration. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
14
CPSC. Resellers Guide to Selling Safer Products
15
ENERGY STAR. Home Efficiency Rebates (HOMES) Program
16
eCFR. 40 CFR Part 273 – Standards for Universal Waste Management
17
US Environmental Protection Agency. Universal Waste
18
U.S. Environmental Protection Agency. Proper Maintenance, Removal, and Disposal of PCB-Containing Fluorescent Light Ballasts
19
U.S. Environmental Protection Agency. PCBs in Fluorescent Light Ballasts