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Cold Weather Emergency Lights - black housing

Cold Weather Emergency Lights – LED, −40°F, 90-Min (UL 924)

Cold weather emergency lights are purpose-built for freezers, cold-storage warehouses, loading docks, and outdoor corridors where temperatures can plunge to −40 °F. These UL 924 life-safety fixtures pair efficient LED (or MR16) lamp heads with low-temperature battery systems, sealed housings, and integral heater kits to deliver reliable egress illumination through winter storms and deep-freeze environments. Explore all emergency lights, weather-tough wet-location emergency lights, and NEMA-rated emergency lights.

UL 924 Rated to −40°F* 90-Min Backup LED / MR16 Sealed & Gasketed Internal Heater
Buyers Guide Tips

What to Look for in Cold Weather Emergency Lights

  • Minimum temperature rating: Match ambient (e.g., −4°F, −20°F, −40°F) at the installed location.
  • Heater package: Integral battery heater with thermostat; confirm power draw and circuiting.
  • Battery chemistry: Cold-tolerant Ni-Cd or lithium designed for fast recharge and cycle life at low temps.
  • Enclosure & sealing: Gasketed housing, condensation control, impact-rated lens; check NEMA/IP ratings.
  • UL 924 runtime: Verified 90-minute egress duration at the stated minimum temperature.
  • Optics & output: Lumen package and beam spread to cover aisles, docks, and wide corridors.
  • Mounting & wiring: Wall/ceiling options, cold-rated cabling, and sealed conduit entries.
  • Diagnostics & expansion: Self-testing availability and remote-capacity for additional heads.
What makes an emergency light “cold-weather rated”?
Purpose-built battery chemistry, an integral heater/thermostat, and a sealed housing that resists condensation and ice—so the unit meets UL 924 egress duration even at sub-zero temperatures.

Built to NFPA 101 life-safety standards, cold-weather models include maintenance-free battery packs (Ni-Cd, lithium, or NiMH) and thermostatically controlled internal battery heaters that preserve capacity in sub-zero conditions. Sealed, gasketed enclosures and impact-resistant lenses keep out moisture and frost, while high-output LEDs provide bright, even coverage along paths of egress for at least 90 minutes during a power loss.

Installation is straightforward: most units feature dual-voltage 120/277 VAC inputs, universal mounting (wall/ceiling), and adjustable optics to aim light across aisles, dock aprons, and freezer corridors. Options include self-testing diagnostics for automated monthly/annual checks, cold-weather battery heater kits, and remote-capable emergency lights to power additional heads from a single fixture.

*Minimum temperature varies by model (e.g., −4 °F, −20 °F, or −40 °F). Always verify ambient rating, heater requirement, and NEMA/IP ingress protection on the product spec sheet for your application.

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Cold Weather Emergency Lights Spec Guide

Spec Snapshot

  • Compliance: UL 924 listed with a minimum 90-minute runtime; supports NFPA 101 egress lighting in sub-zero environments.
  • Low-Temp Rating: Models available to −40 °F (others −20 °F/−4 °F). Always verify the unit’s ambient range and heater requirement on the submittal.
  • Battery & Heater: Cold-rated Ni-Cd/LiFePO4/NiMH packs with thermostatically controlled internal battery heaters to preserve capacity at low temperatures.
  • Enclosure & Ingress: Sealed, gasketed housings (often NEMA 4X/IP66) with impact-resistant lenses to resist moisture, frost, and wash-down exposure.
  • Optics & Output: High-efficacy LED or MR16 heads with adjustable aim for aisles, docks, and freezer corridors; review photometric spacing at the planned mounting height.
  • Power & Controls: Dual-voltage 120/277 VAC, solid-state charger/automatic transfer, low-voltage disconnect, AC lockout, brownout detection, test button & status LED. Self-testing diagnostics available.
  • Mounting & Options: Universal wall/ceiling hardware; remote-capable variants to power additional heads (confirm available remote wattage/runtime). Cold-weather kits and corrosion-resistant finishes offered.

FAQs About Cold Weather Emergency Lights

What temperatures can cold-weather emergency lights handle?

Models are commonly rated from −4 °F down to −40 °F. Always confirm the specific ambient range on the product submittal.

Why do these units include heaters?

Low temperatures reduce battery capacity. An internal, thermostat-controlled heater keeps the battery within its optimal range to ensure a full 90-minute runtime.

Which battery chemistries work best in the cold?

Ni-Cd and NiMH maintain discharge performance at low temps; LiFePO4 is preferred for ultra-low environments (down to −40 °F) when paired with a heater kit.

Are these fixtures fully sealed?

Yes. Many use NEMA 4X/IP66 gasketed enclosures with impact-resistant lenses to block moisture, frost, and wash-down spray.

What light sources are available?

High-efficacy LED heads are standard; some models offer MR16 (halogen or LED) for tighter beam control. Heads are typically adjustable for precise aiming.

Do they include self-testing?

Many units provide self-diagnostics that automate the required monthly 30-second and annual 90-minute tests and indicate faults via a status LED.

What power and mounting options are typical?

Most accept 120/277 VAC and offer universal wall/ceiling mounting with adjustable optics. Verify any heater power draw and conduit requirements on the cut sheet.

Any installation tips for freezer rooms?

Confirm ambient rating at the installed height, seal penetrations to prevent condensation, and allow service access for heater and battery inspections.