The Precision Lumatrol T-168AL stem mounting photo control is a great choice for parking lots lights, security lights, and walkway lights and is specifically designed for locations where high vandalism creates high maintenance. The heavy-duty cast aluminum housing is 20 times more resistant to high impact objects, like rocks and bats, than a standard plastic housing. The SPST switch with an external light level slide allows on site adjustment between 3 and 10 foot-candles. The 1/2-inch stem has 14 threads, fits a 1/2-inch knock out, and includes three color-coded 6-inch leads. Functional in temperatures ranging from -40 degrees to 170 degrees Fahrenheit, it is rated for 208-277 volts for the commercial setting.