The TORK 2008B Turn-Lock Photocontrol Light Sensor provides a simple and accurate way to control roadway and commercial area lighting based on ambient light level. Use the 2008B for state and county DOT and municipalities use on roadway and bridges as well as general commercial facilities. This light sensor features a molded, sealed, IR-filtered non-drifting silicone sensor for extreme accuracy and is calibrated to duplicate a human eye response. Other features include surge protection, a UL Listed DC relay to reduce bounce and prolong contact life, a polycarbonate housing and window to protect against extreme weather elements and moisture and a delayed OFF response to prevent false switching due to vehicle or other passing light sources. Rated for 105-130VAC, 50/60Hz.