Intermatic® Thermal Photocontrol, Locking Mounting, Series: LC4500, 120 to 277 VAC, 15 A, 50/60 Hz, 1800 to 4155 W Tungsten, 1000 to 2290 VA Ballast, SPST, Spark Gap Arrester, 30 to 90 s, Cadmium Sulfide Sensor, 0.5 FC ON, 15 FC OFF, Environmental Conditions: -20 to 104 deg F, 3650 Operating Cycles, Twist-Lock Mount, Polypropylene, Blue/White, 3 in Dia x 2-3/4 in H