This twist lock photocell has IP 65 protection and can function in temperatures between -40 degrees F. to 158 degrees F. It operate at 250-305 volts and features a 30-120 second time delay switch-over for luminaire protection. The photocell can control 1000-watt ballasts or 1800-watt incandescent or halogen bulbs. It has a life expectancy of 6,500 cycles and is UL listed.