Westek OLC5CLC 150W Outdoor Screw-In Flood Light Control, Grey On at Dusk, Off at Dawn - for incandescent bulbs only Long stem design fits inside most PAR floodlight, spotlight or enclosed exterior fixtures Ideal for driveways, entrances and patio lights / Water Resistant Includes shroud to shield sensor from reflected light Reliable solid state circuitry, 150 Watts Max