Using the Hydrofarm Auto Pilot TM01715D 7-Day Dual-Outlet Digital Programmable Timer to automate your lighting adds convenience and encourages productive healthy plant growth with consistent hours of light. Timers are also essential for many hydroponic system applications. This programmable timer has 2 outlets and is not for use with digital ballasts. This timer has a 1 min on/off up to 8 on/off cycles per day and can control 2 outlets simultaneously. The on/off switch can be used to override the programmed settings and the included battery retains settings if the electricity goes out. The timer is rated for 15 amps 120 volts and 1725 watts. The timer can be used for other devices both in indoor gardening or other settings. It is intended only for indoor use.