The Precision Lumatrol T-168 stem mounting wire-in photo control is a great choice for parking lot lights, security lights, decorative lights, and walkway lights. The Lexan housing is both durable and weatherproof. The unit functions in temperatures from -40 degrees to 158 degrees Fahrenheit. The SPST switch has a 15-second time delay and is rated for 208-277 volts. The unit fits a 1/2-inch knock out and comes with a standard 1/2-inch, 14-thread stem for mounting. The three color-coded 6-inch leads are weatherproof and attach easily to standard wiring. The external light level slide can easily be adjusted for earlier or later on/off times.