LED Exit Signs & Emergency Lights: US Compliance Guide for Commercial Buildings

A failed exit sign inspection can shut down a business or trigger a fine before anyone even knew there was a problem. Most owners don't think about exit sign with emergency lights until an inspector shows up or a battery dies during a drill. By then, it's already a compliance issue.

These are common, fixable problems. But they carry real fines under OSHA 1910.37. Nothing But LEDs carries the full range of compliant LED exit signs and emergency backup lighting for businesses across the US. This guide breaks down exactly what OSHA and NFPA 101 require, how LED stacks up against fluorescent, and what to look for before buying.

 

Legal Requirements in the US

Exit signs and emergency lighting in commercial buildings aren't optional safety measures, they're federally mandated. Two standards govern most US commercial properties: OSHA 1910.37 and NFPA 101. Understanding both tells you exactly what's required and what gets you cited.

 

OSHA Requirements

OSHA standard 29 CFR 1910.37 covers exit routes for general industry. The core requirements for exit signage are specific:

• Every exit must be marked by a sign reading EXIT in letters at least 6 inches high with strokes at least ¾ inch wide.
• Exit signs must be illuminated at all times to a surface value of at least 5 foot-candles.
• A reliable backup power source is required to keep signs lit during power failures.
• Directional arrows are required anywhere the exit route isn't immediately obvious.
• Doors or passages that could be mistaken for exits must be labeled 'Not an Exit.' 

Non-compliance isn't cheap. OSHA can issue fines of up to $16,131 per serious violation and that figure repeats daily until the issue is corrected. For a facility with multiple non-compliant signs, that adds up fast.

NFPA 101 Life Safety Code

NFPA 101 adds details that OSHA doesn't prescribe. Key requirements include:

• Emergency exit sign with lights must activate automatically when normal power fails.
• Emergency backup lighting must maintain at least 1 foot-candle at floor level along egress paths.
• Battery backup must sustain operation for a minimum of 90 minutes.
• Signs must be spaced so no point along an exit corridor is more than 100 feet from a visible exit light sign.
• All internally illuminated signs must be listed and compliant with ANSI/UL 924.

OSHA accepts NFPA 101 as meeting its exit route rules under 29 CFR 1910.35. In simple terms, if you follow NFPA 101, you’re also meeting OSHA requirements. 

Testing & Inspection Requirements (Monthly & Annual)

Compliance isn't just about having the right fixtures, it's about maintaining them. Both OSHA and NFPA 101 require documented testing on a defined schedule.

 

 

Keep a written log of every test. Inspectors ask for records. A fixture that works fine during a test but has no documentation is still a citation risk.

LED vs Fluorescent Exit Signs

LED vs fluorescent exit signs is a common decision in commercial buildings today. Both run 24 hours a day, 365 days a year, just like most indoor lighting systems in commercial buildings. Understanding the difference helps you choose a safer, more efficient, and long-lasting option. 

Energy Use Comparison

This is where LED wins decisively. A standard fluorescent exit  light sign draws around 16 watts. An incandescent sign can draw up to 40 watts. Both run 24 hours a day, 365 days a year.

An LED exit sign like NBL's 2W dual-head models draws just 2 watts. According to the EPA's ENERGY STAR program, a typical LED exit sign costs less than $4 per year to operate compared to over $30 annually for an equivalent incandescent fixture. For a building with 20 signs, that difference runs to hundreds of dollars a year before maintenance is factored in.

 

 

Maintenance Comparison

Fluorescent lamps in exit signs last around 5,000 to 6,000 hours. This means they need replacement roughly once a year in a continuously running sign. Incandescent bulbs burn out even faster, sometimes every few months.

An LED emergency exit sign with quality LEDs is rated for 25,000 to 50,000+ hours. At continuous operation, that's a fixture that runs for a decade before needing any lamp replacement. The battery still needs periodic replacement and regular testing but the lamp itself simply isn't a maintenance item anymore.

Key Features to Look For

Exit signs and emergency lights need to work when it matters most. Knowing what features to look for helps you choose the right ones and avoid problems later. 

Battery Backup Duration

The legal minimum is 90 minutes. Most compliant exit sign battery backup models deliver exactly this. When comparing products, check the actual battery rating. A 90-minute backup for a low-wattage LED sign needs much less battery power than older, higher-wattage fixtures, which is why LED makes battery backup more efficient and reliable. 

NBL's dual-head LED emergency light runs on a 3.6V 1000mAh battery and delivers 200 lumens. This is enough to meet the required 1 foot-candle lighting level along exit paths for the full 90-minute duration. It is also UL listed. 

Lettering Colour (Red vs Green)

Both red and green exit signs are code-compliant in the US under OSHA 1910.37. The choice often comes down to local Authority Having Jurisdiction (AHJ) preference and consistency within the building.

• Red signs: traditional US standard, historically associated with emergency alerts, required in many East Coast jurisdictions.
• Green signs: ISO standard, increasingly common on the West Coast, more visible in smoke-filled conditions because the human eye is more sensitive to green wavelengths.

NBL's dual-head LED exit sign solves this with a switchable red/green lens — one product, two color options, no need to stock separately. Operating at 2W at 120/277V AC.

ETL/UL Listing

Compliance is not optional for exit signs.

All exit signs and emergency lights must be UL 924 listed (or ETL equivalent) to meet safety standards. This certification ensures the product has been tested for:

• Electrical safety
• Battery performance
• Emergency operation

Without proper listing, a product can fail inspection even if it appears to work.

Placement & Visibility Requirements

Where a sign goes matters as much as which sign is used. Key placement rules:

• Mount directly above or adjacent to each exit door.
• In corridors, space signs so no point is more than 100 feet from a visible LED exit sign.
• Where the exit path turns or isn't obvious, use directional exit signs with arrows.
• Mount height: signs should be visible at 100 feet minimum viewing distance under normal conditions.
• Avoid placement where the sign competes visually with decorative lighting or bright displays.

This becomes even more important in larger spaces where continuous lighting setups like LED linkable fixtures are used, as they can affect how clearly exit signs stand out. 

NBL Exit Sign Range

Nothing But LEDs carries a complete selection of exit LED sign and emergency lighting products for commercial compliance requirements. Here's what's available:

 

Installation Guide

Installing a hardwired LED exit sign or emergency light is a straightforward electrical task. Here's the standard process for a new or replacement install:

 

✓  Turn off the circuit breaker for the lighting circuit where the sign will be wired. Verify the circuit is de-energized before touching any wiring.

✓  Mount the back plate or housing to the wall or ceiling at the correct height. Most exit signs include a mounting template.

✓  Connect the wiring: black to hot, white to neutral, green to ground. For 277V circuits, confirm the sign's voltage rating matches. Most NBL models are rated 120–277V AC.

✓  For battery-backed models: connect the battery leads as shown in the wiring diagram. Insert the battery into the housing.

✓  Test the fixture by pressing the test button. The sign should remain illuminated when mains power is interrupted.

✓  For combo units with emergency heads: aim the heads toward the egress path as required by your floor plan.

✓  Document the installation date and initial test result in your compliance log.

 

Tip: if the building uses 277V lighting circuits (common in larger commercial and industrial spaces), verify the sign's dual-voltage rating before ordering. NBL's 120/277V models cover both without any rewiring.

FAQs

Do I need an exit sign with emergency lights in a small retail store?

Yes, if the store has employees and customers and the exit isn't immediately visible from every point inside. OSHA 1910.37 applies to most commercial buildings regardless of size. The test is whether someone unfamiliar with the layout could find the exit under emergency conditions.

What is an exit sign battery backup, and how long must it last?

It’s the battery that keeps the sign working during a power failure. NFPA 101 and IBC 1013 require at least 90 minutes of backup. Most LED fixtures meet this, but always check the spec sheet. 

What is the difference between an exit sign and emergency backup lighting?

An exit LED sign shows where the exit is. Emergency backup lighting lights up the path to get there—floors, hallways, and stairs. Both are required. Combo units include both in one fixture. 

Is green or red better for a commercial exit sign?

Both are allowed under OSHA. Green is often more visible in smoke, while red is more common in the U.S. It’s best to check local codes and stay consistent across the building. 

How often does an LED emergency exit sign need replacing?

LEDs usually last 25,000 to 50,000 hours, which can mean 10+ years of use. The battery typically needs replacement every 3 to 5 years, depending on usage and testing. 

Conclusion

Exit sign compliance is simple when done right. Use the correct fixtures, place them properly, and test regularly. OSHA 1910.37 and NFPA 101 set the standard.

LED is the most practical choice. It saves energy, needs less maintenance, and meets code requirements reliably.

Nothing But LEDs offers a full range of exit sign with emergency lights, LED exit signs, and emergency backup lighting solutions for commercial use. You can explore options here: nothingbutleds.com/collections/led-emergency-exit-sign.