Emergency lighting exists to keep egress paths usable when normal power is lost. For facility managers, contractors, and purchasing teams, the practical question is rarely just “do we need emergency lights?” It is usually “where do we need coverage, what kind of fixture fits the space, and what details should be confirmed before ordering?”
Code note: This guide is a practical purchasing and planning aid, not a code determination. Confirm final requirements with the authority having jurisdiction, the adopted code edition, and the project documents.
Where emergency lights are commonly required
Emergency lights are commonly used along exit access paths, exit doors, corridors, stairs, open work areas, equipment rooms, warehouses, and other spaces where people need backup illumination to move toward an exit. OSHA requires exit routes to be adequately lighted and also calls out exit lighting as a safeguard that must stay in proper working order. That makes emergency lighting both a design issue and an ongoing maintenance issue.
Start by walking the path a person would take during an outage: from work area to corridor, to stair or exit passage, to the exit discharge. Note doorways, turns, long aisles, ramps, equipment rooms, damp areas, and exterior transitions. Those notes help determine whether standard emergency lights, remote heads, or specialty fixtures are the better fit.
Runtime and battery backup planning
Many commercial projects use 90-minute emergency operation as the baseline. The exact requirement depends on the adopted code, occupancy, local amendments, and inspection authority. When selecting products, confirm voltage, battery type, runtime rating, head count, remote-head capacity, and whether self-testing diagnostics are expected by the owner or inspection plan.
Testing basics
Emergency lighting should be tested often enough to prove that fixtures operate, batteries hold charge, and heads are aimed where coverage is needed. A good maintenance routine includes quick functional checks, longer runtime checks, fixture cleaning, battery replacement notes, and a log that records failures and repairs.
Common mistakes
- Using indoor emergency lights in damp, outdoor, or washdown spaces.
- Forgetting that remote heads draw capacity from the battery unit that powers them.
- Replacing an old unit without checking voltage, mounting footprint, and head output.
- Treating a product listing as a code approval instead of confirming the project requirement with the AHJ.
- Leaving failed batteries or damaged lamp heads in place after a monthly test.
Product selection framework
- Standard emergency lights for typical indoor commercial egress paths.
- Wet-location emergency lights for damp, outdoor, washdown, or harsher areas.
- Remote emergency lights when one unit needs to power additional heads nearby.
- High-lumen emergency lights for larger rooms or higher mounting heights.
- Hazardous-location lights when the environment has a classified-location requirement.
Need help matching products to a project list? Send counts, photos, voltage, mounting notes, and any existing model numbers through Request a Quote.
Official references
- OSHA 1910.37: Maintenance, safeguards, and operational features for exit routes
- NFPA 101 Life Safety Code
- UL 924 Standard for Emergency Lighting and Power Equipment