"This Designer's Edge Dusk to Dawn Floodlight has a light-sensing photocell that automatically turns the light on at sundown and off at sunup. Twin 13 Watt bulbs create the same amount of light as a 120 Watt incandescent bulb. Power Source AC, Includes qty. 1, Application Security, Battery Required No, Light Type Fluorescent. Acrylic prismatic lens Electronic ballast works down to -20F UL and CUL listed 110V 7 1/4in.L x 8 1/2in.W x 4 2/3in.H"