Set it and forget it! The Intermatic ST01 is the perfect in-wall 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. The white timer allows 42 ON/OFF operations per week with the option of 4 separate programming options for complex schedules. It also includes a lithium battery backup in case of power outages and features a manual override as well as a random mode for a lived-in look while away.