Warehouse-Lighting.com’s emergency ballast for
350-500 lumen fluorescent fixtures includes a high-temperature,
maintenance-free nickel-cadmium battery, charger and electronic circuitry in a
compact white metal case. A solid-state charging indicator light lets you
monitor the charger and battery. It can operate a 17W-40W 2’ to 4’ T8, T10 or
T12 fluorescent lamp at lowered illumination in emergency mode for at least 90
minutes. This ballast comes with installation hardware and a five-year warranty.