LAMP HOLDER SOCKETS WITH PHOTO CELL SENSORS AUTOMATICALLY TURN ON LAMPS AT DUSK OR WHEN IT IS DARK, AND TURN THEM OFF AT DAWN OR EXPOSED TO LIGHT. THIS IS A 2 PACK SET. THESE INSTANTLY TURN ANY LAMP INTO A HOME SECURITY SYSTEM, PROTECTING YOUR HOME AND FAMILY. EASY TO USE ELECTRIC EYE SENSOR SIMPLY SCREWS INTO ANY LIGHT SOCKET. LIGHT BULBS THEN SCREW INTO THE SENSOR. BULBS TO BE USED ARE STANDARD SIZE INCANDESCENT BULBS, 60 WATTS TO 150 WATTS MAXIMUM. BLANK PRICING. 10" L X 10" W X 6.5" H