Set it and forget it! The Intermatic EI600WC white in-wall astronomic timer is the ultimate commercial heavy duty astronomic timer. Designate your current time and date and the astronomic feature will automatically adjust this timer for sunrise and sunset times without the use of a photocell. This 1800 to 4155 watt rated timer can control a variety of electrical components including fluorescent fixtures, high wattage lamps, and electric motors. It allows 40 ON/OFF operations per week with the option of 4 separate programming options and can combine astronomic functions with independent functions for highly customized switching. The timer also features non-volatile memory.