Century 24 Hour Heavy Duty Plug-in Mechanical Timer Grounded is essential for all hydroponic system applications. Programming can be set for multiple on/off events, so your entryway will be lit when you arrive home. This plug-in timer provides up to 48 on/off settings per day and the cycle repeats every 24 hours. Easy to set in 15 minute intervals with never-lose segment pins that can't be removed or lost. Use the manual override button to turn the timer on or outlet on, so you don't have to delete any preprogrammed settings. Plug fans, lamps or holiday lights in and set the timer to turn the device on and off so it won't remain on when unused. The Timer provides the safety and security as you come home to a lighted house. No fumbling for the light switch or tripping over obstacles in your way, the lights are on when you walk in the door. This timer is compatible with compact fluorescent lighting, LED bulbs. The Century Timer bring simplicity to your life, by maximizing convenience, security and energy savings.