This outdoor light fixture serves a dual-purpose: it operates as a normal dusk-to-dawn light utilizing its photocell, and also has a battery backup that provides 90 minutes emergency of operation if power fails at any time. The BLT-ACBB-BR-CL uses an 11-watt LED light source that is protected by a prismatic polycarbonate lens joined to the gasketed aluminum face cover. The LEDs are intensified by a mirror. It has an impressive output of 1080 lumens at night (when the battery is on standby), and 260 lumens during power failure emergencies.BatteryThe BLT-ACBB-BR-CL includes a sealed nickel cadmium battery pack with a life expectancy of 15 years. Nickel cadmium batteries offer high discharge rates and continue to perform in a vast temperature ranges. NiCad technology provides long lasting, safe and reliable performance by utilizing the jelly-roll design and allows a Ni-Cad cell to deliver a much higher maximum current than an equivalent size alternative battery.Features * Streamlined low-profile aluminum housing with a dark bronze powder coat finish. * Internal heater allows unit to operate in temps as low as -4° F. * AC and Emergency light combined into one wall pack. * 11W LED lamp coupled with a mirrored reflector and prismatic polycarbonate lens. * Projects 1080 lumens in AC Operation and 260 lumens for emergency mode. * 5000K LED color temperature. * UL Listed for Wet Locations * Self test microprocessor included - automatically tests the battery and lamp readiness and performs scheduled discharge tests. * Dual primary 120 or 277 VAC operation. * Includes day/night photocell sensor. * Long lasting Nickel Cadmium battery included.