OSHA’s lighting standards for general industry, set out in 29 CFR Part 1910, take a performance-based approach: illumination must be “adequate” for the task and for employee safety, with specific numerical minimums reserved for exit signs, exit routes, electrical equipment working spaces, and areas where powered industrial trucks operate. Because Part 1910 does not publish a general foot-candle table, employers meet the “adequate” test by matching the values OSHA publishes in its construction and shipyard rules and by following the Illuminating Engineering Society’s recommended practices, which OSHA inspectors reference when judging whether lighting is sufficient.
How the General Industry Rule Actually Works
Part 1910 does not list minimum illumination levels for most work areas. The burden sits with the employer: provide lighting suited to the specific tasks employees perform and to the hazards present. If a worker trips in a dim aisle or misreads a gauge in a poorly lit room, OSHA can cite you even without a prescriptive foot-candle threshold, because the lighting was not adequate for the work being done.
When no number is written into the rule, OSHA inspectors lean on IES recommended practice documents, particularly ANSI/IES RP-7 for industrial facilities. These consensus standards carry real enforcement weight. OSHA’s shipyard standard at 29 CFR 1915.82 incorporates IES RP-7 by reference, and inspectors apply similar reasoning in general industry.
Foot-Candle Benchmarks You Can Use
Because Part 1910 has no illumination table of its own, employers commonly reference the values OSHA publishes for construction and shipyards. These tables are not directly enforceable in a general industry workplace, but they reflect the same IES recommendations inspectors use, which makes them the most practical benchmarks available.
The construction standard at 29 CFR 1926.56 publishes Table D-3 with these minimums:
- 30 foot-candles for first aid stations, infirmaries, and offices
- 10 foot-candles for plant shops, mechanical and electrical equipment rooms, carpenter shops, and active storerooms
- 5 foot-candles for indoor warehouses, corridors, hallways, exitways, and general work areas
- 3 foot-candles for concrete placement, excavation, active outdoor storage, loading platforms, and refueling areas
The shipyard standard at 29 CFR 1915.82 mirrors these tiers closely: 30 foot-candles for offices and first aid stations, 10 for machine shops and equipment rooms, 5 for corridors and exits, and 3 for general access areas.1Occupational Safety and Health Administration. 29 CFR 1915.82 – Lighting If your general industry facility maintains at least these levels for comparable areas, you are on solid ground during an inspection.
Exit Routes and Exit Signs
Exit routes are where Part 1910 gets specific. Under 29 CFR 1910.37, every exit route must be “adequately lighted so that an employee with normal vision can see along the exit route.”2Occupational Safety and Health Administration. 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes That language is still performance-based, but the standard adds several hard requirements on top of it.
Exit signs carry the most detailed specifications in the regulation. Each sign must be illuminated to at least 5 foot-candles (54 lux) by a reliable light source and must be distinctive in color. Self-luminous or electroluminescent signs are permitted if they maintain a minimum surface luminance of 0.06 footlamberts (0.21 cd/m²). The word “Exit” must appear in plainly legible letters at least 6 inches (15.2 cm) tall, with principal strokes at least three-quarters of an inch (1.9 cm) wide.2Occupational Safety and Health Administration. 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Doorways or passages that could be mistaken for exits must be marked “Not an Exit” or identified by their actual use, such as “Storage” or “Mechanical Room.” Where the direction to the nearest exit is not immediately obvious, directional signs are required along the exit access, and the line of sight to an exit sign must remain clear at all times.2Occupational Safety and Health Administration. 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Electrical Equipment Working Spaces
Section 1910.303 imposes a firm requirement that goes beyond the general “adequate” language. Every indoor working space around service equipment, switchboards, panelboards, and motor control centers must be illuminated.3Occupational Safety and Health Administration. 1910.303 – General A separate fixture is not required if an adjacent light source already illuminates the space, but the lighting cannot be controlled by automatic means only. That rule prevents motion sensors or timers from plunging a worker into darkness while working near energized parts.
For equipment rated above 600 volts, the requirements go further. Lighting outlets must be arranged so that a person replacing a lamp or repairing the lighting system is not endangered by live parts, and switches must be positioned so a worker cannot accidentally contact any live or moving part while turning the lights on.3Occupational Safety and Health Administration. 1910.303 – General
Powered Industrial Truck Areas
Warehouses and distribution centers running forklifts face a specific illumination trigger under 29 CFR 1910.178. When general lighting in an operating area falls below 2 lumens per square foot (roughly 2 foot-candles), auxiliary directional lighting must be provided on the truck itself.4Occupational Safety and Health Administration. 1910.178 – Powered Industrial Trucks Most well-lit warehouses exceed the threshold, but loading docks at night, cold storage rooms, and outdoor staging areas can easily fall below it. Either raise the overhead lighting in those spaces or equip every truck operating there with functional auxiliary lights.
Temporary Lighting
Temporary wiring installations have their own lighting rules under 29 CFR 1910.305. All lamps used for general illumination in a temporary setup must be protected from accidental contact or breakage by a suitable fixture or lampholder with a guard.5eCFR. 29 CFR Part 1910 Subpart S – Electrical Metal-cased sockets must be grounded. Bare bulbs hanging from wires without guards are among the most straightforward violations an inspector can write.
Temporary lights also cannot be suspended by their electrical cords unless both the cord and the fixture were designed for that use. If you are stringing temporary lighting during a shutdown or renovation, use hangers, hooks, or cable supports rated for the fixture weight.
Office and Computer Workstation Lighting
Adequate illumination is not only about having enough light. Too much light in the wrong place creates glare, washes out screens, and causes eye strain that degrades both safety and productivity. OSHA’s computer workstation guidance recommends office lighting between 20 and 50 foot-candles for environments using CRT displays, and up to 73 foot-candles where LCD monitors are in use.6Occupational Safety and Health Administration (OSHA). Computer Workstations – Workstation Environment
The practical guidance focuses on controlling glare rather than hitting a single number. Position monitors at right angles to windows so direct sunlight does not wash out the screen. Use diffusers or louvers on overhead fixtures to reduce hot spots in the visual field. Add task lighting for paper-based work so ambient room lighting can stay at a level that does not overwhelm the display. Paint walls in medium, non-reflective colors to limit reflected glare.
A standard four-bulb fluorescent fixture on a 9-foot ceiling produces roughly 50 foot-candles at desktop level, which can be too bright in a computer-heavy environment. OSHA suggests removing the middle bulbs to cut the intensity if diffusers are not available.6Occupational Safety and Health Administration (OSHA). Computer Workstations – Workstation Environment
Emergency and Backup Lighting
OSHA requires exit routes to remain usable during a power failure, but Part 1910 does not specify a minimum emergency foot-candle level or battery duration. Those numbers come from NFPA 101, the Life Safety Code, which most state and local jurisdictions adopt and which OSHA references during enforcement. NFPA 101 Section 7.9.2 requires emergency illumination for at least 90 minutes after normal power fails. Initial illumination must average at least 1 foot-candle (10.8 lux) along the path of egress at floor level, and no point can drop below 0.1 foot-candle (1.1 lux).
Emergency lighting systems must activate automatically when normal power is lost. Battery-powered units are the most common solution, though generators also satisfy the requirement. Battery units listed under UL 924 must use rechargeable batteries and include indicators that alert occupants if the battery or charging system becomes unavailable.
Testing Schedule
NFPA 101 Section 7.9.3 requires a 30-second functional test at least once every 30 days, plus an annual test lasting a full 90 minutes to verify the battery can sustain illumination for the entire required duration. Self-testing and self-diagnostic units can perform these tests automatically, but someone still needs to review and document the results. A documented power outage of at least 90 minutes can count as the annual test. Exit signs follow the same schedule: a 30-second monthly test and a 90-minute annual test. Signs that stay dark during a power failure, whether from a dead battery or a failed lamp, are among the most commonly cited issues during fire and safety inspections.
Enforcement and Penalties
OSHA can cite lighting violations under the specific standards above or, when no prescriptive standard applies, under the General Duty Clause at Section 5(a)(1) of the OSH Act. The General Duty Clause allows a citation whenever a recognized serious hazard exists and the employer has not addressed it. Inadequate lighting that creates tripping hazards, obscures machine guards, or leads to struck-by incidents fits within that authority.
As of 2025, OSHA’s civil penalties for lighting violations run up to $16,550 per serious or other-than-serious violation, and up to $165,514 per willful or repeated violation, with a $11,823 minimum for willful citations.7Occupational Safety and Health Administration. 2025 Annual Adjustments to OSHA Civil Penalties8Occupational Safety and Health Administration. 1903.15 – Proposed Penalties Each instance counts as a separate violation. A facility with burned-out exit sign lighting on three floors could face three separate serious citations. Willful or repeated classifications are reserved for employers who knew about the hazard and ignored it, or who were previously cited for the same deficiency and failed to correct it.