Exit sign & emergency light combos (also known as combination exit signs, all-in-one exit signs or 2-in-1 exit signs) unite an illuminated “EXIT” legend (as required by code) and egress lighting into one UL 924–listed life-safety fixture. This guide explains what combo units are, why and when they’re required, when they’re optional, and how to choose the right model for your space. See the full lineup: Exit Sign & Emergency Light Combos.
Quick Picks
What They Do
- EXIT legend + emergency lamps in one device
- Automatic transfer to battery for ≥ 90 minutes (UL 924)
- Ideal above exits, at corridor turns, or by stairwell doors
When They Shine
- Space-limited installations and retrofits
- Unified testing/maintenance (2-in-1)
- Wet-location (outdoor) & hazardous-location variants available
How to Choose
- Location: indoor, wet-location combos, or hazardous-location (explosive environment)
- Features: remote-capable (for remote heads), self-testing combos, high-lumen heads
- Letters: red/green per local code (NYC requires 8" red letters on metal signs)
Combo-unit requirement checklist
| Situation | Likely approach | Review note |
|---|---|---|
| Exit sign and emergency light needed at one doorway | Exit sign emergency light combo | Confirm UL 924 listing and 90-minute operation. |
| Exit sign location is separate from the dark area | Separate fixture layout or combo guide | Photometrics and aiming matter more than fixture count. |
| Exterior, damp, or diagnostics-driven project | Wet-location or self-testing combos | Match environment, testing, and local inspection expectations. |
If you’re opening a business or managing a building, you’ve probably seen those exit signs with little lights attached (emergency lamp heads) above doorways. Those are combo units — compact, code-compliant fixtures that make inspections smoother and keep egress paths lit when it matters (during power outages or emergencies).
What Are Combo Units?
An exit/emergency combo unit (also called a combination exit sign and emergency light) is a single device that serves two vital life-safety functions: it clearly marks an exit route (path of egress) and provides emergency lighting during a power failure. In other words, it’s an illuminated exit sign with a built-in battery backup and attached floodlights (emergency lamp heads).
On normal power, the EXIT legend (red or green LEDs) stays lit. During a power outage, the unit automatically switches to its battery backup and powers both the EXIT face and the light heads for at least 90 minutes.
Note: Any code-compliant exit sign or emergency light in the U.S. should be UL 924 listed for emergency egress.
Why Use a Combo Unit?
- Convenience: One installation, one wire run, one device to test.
- Space Saving: Perfect for tight corridors, above doorways, and small stair landings.
- Clean Look: Fewer fixtures on the wall for a unified appearance.
- Guaranteed Coverage: Lamp heads placed at the exit sign ensure doorway illumination.
- Code Compliance: Easier to meet life-safety requirements with a single, listed unit.
When Are Combo Units Required?
Building codes and fire safety regulations typically require both illuminated exit signs and emergency egress lighting in most non-residential occupancies. A combo unit provides an easy way to comply with both requirements using one device. You will commonly see combo units in:
- Commercial/Public Buildings: Offices, restaurants, retail stores, clinics, churches, etc.
- Multi-Story Buildings: Especially in stair enclosures and at corridor changes of direction.
- Rooms with No Windows: Interior offices, storage rooms, restrooms — any windowless enclosed space.
- High-Occupancy Venues: Auditoriums, gymnasiums, theaters, etc.
- Permit-Inspected Businesses: Most occupancies beyond one- and two-family dwellings.
When Are They Not Required?
- Single-Exit Spaces: Very small suites with only one exit that is clearly visible (if the AHJ allows an exception).
- Private Dwellings: One- and two-family homes, individual apartments, or sleeping rooms not open to the public.
- Generator-Backed Egress: Buildings with emergency circuits on a backup generator that maintain required egress light levels.
- Photoluminescent Exit Signs: Glow-in-the-dark exit signs where listed and properly charged (approved non-electrical alternative).
Choosing the Right Combo
- Lettering: Red or green LEDs (follow local code; NYC requires 8" red letters in a metal exit sign).
- Location: Indoor, wet-location (outdoor) combos, or hazardous-location (for explosive environments).
- Material: Thermoplastic (budget-friendly), aluminum (architectural), or steel (vandal-resistant for high-abuse areas).
- Features: Remote-capable (supports remote heads), self-testing exit sign & light combos, high-output lamps.
- Budget: Balance upfront cost with durability and maintenance (metal housings reduce damage in abuse-prone areas).
Conclusion
Combo units take the guesswork out of life-safety by delivering an illuminated exit sign and emergency lighting together in one battery-backed device. While very small spaces with one clearly visible exit may qualify for exceptions, most commercial occupancies benefit from UL 924-listed combo exit signs that streamline installation and inspections.
Need more detail? See the resources below or visit our full category.
Further reading: Combo Unit Compliance & Safety Guide
Related self-testing combo guide: When a combo unit is the right format, choose self-testing exit sign combos if automatic diagnostics and visible fault status are desired.
Think in terms of coverage, not a default requirement
A combo unit is the right choice when it solves both exit marking and emergency illumination from one location. If the route needs light somewhere else, separate fixtures are usually the cleaner layout.
| Planning signal | Best next path | What to confirm |
|---|---|---|
| Doorway or landing needs both an EXIT legend and emergency heads | Exit sign emergency light combos | Confirm face count, arrows, mounting, head direction, runtime, and testing. |
| EXIT sign location and light coverage point are different | Exit signs plus emergency lights | Use separate fixtures when the light path needs different spacing or aiming. |
| Project needs a deeper combo selection path | Exit sign emergency light combo guide | Compare standard, wet-location, remote-capable, self-testing, and metal-housing combo options. |
| The overall egress plan is still uncertain | Emergency lighting guide | Use the broader guide to map routes, fixture families, testing, and documentation. |
Related die-cast combo note: When a combo unit is appropriate and the fixture is visible, a die-cast aluminum exit combo can improve finish quality without separating the sign and heads.
Related high-lumen combo note: When a combo unit is appropriate but the mounting height is challenging, a tall-ceiling exit sign combo can be checked against the spacing table before final selection.
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