This instant twist lock photocell has IP 65 protection and can function in temperatures between -40 degrees F. to 158 degrees F. It operate at 100-140 volts and features a built-in surge arrester. The photocell can control 1800-watt ballasts or 1000-watt incandescent or halogen bulbs. It has a life expectancy of 5,000 cycles and is UL listed.