Photocontrol, 120 V ac, 1800 W, 1-13/16 in Length, 1-5/16 in Width, 1-9/16 in Height, Sonic-Welded Polycarbonate Housing Material, Gray 0, Automatic Switch, Thermal Type Photo Control (Cadmium Sulfide) Sensor, -40 °F Operating Temperature, +158 °F Operating Temperature, Button Fixed Mount, 0.2 lb