Photocontrol features a heavy-duty thermal bi-metal switch that provides a 30-60 second time delay. This virtually eliminates unwanted lamp cycling that could be caused by lightning, car headlights, etc. Although the turn-on level is pre-set at the factory, each control is furnished with an adjustable slide shutter/bar that allows field adjustment. Typically mount on fixtures or boxes. Weatherproof Polycarbonate Housing. Single Pole, Single Throw Switch. Contact Position at Night is Normally Closed. Standard 1/2” I.P.S. Pipe Threaded Nipple, Includes Gasket and Locknut. 6" Color Coded Leads with Wiring Diagram on Control. UL Listed.