Mulberry SPT-15, 30826 (Like ALR AREA LIGHTING RESEARCH, SPT-15), Outdoor Lighting Swivel Photo Electric Control Sensors Photocell 1800W, SWIVEL PHOTO CONTROL 2000 watt maximum; incandescent/tungsten loads 1900 VA: mercury vapor, high pressure sodium or metal halide/ballasted loads 120 volts Direct wire Turn on and off levels can be changed by sliding light shield partially over the control eye Adjustable mount-1/2" MPT Externally mounted direct wire with non-metallic housing and adjustable swivel base Gray. SPT Model.