Marineland/Aquaria Aquarium Light Timer, an easy-to-program, 24-hour programmable device that turns aquarium lights on and off automatically.
24 Hour Light Timer is designed for use with all freshwater and marine aquarium lighting, the Aquarium Light Timer features a manual override and is grounded for operational safety. Rated at 15 amps, it has almost twice the current capacity of other light timers.
Timer-regulated lighting helps control algae growth, provides fish with a dependable, stress-minimizing waking/sleep cycle, and is ideal for maintaining a plant-healthy environment while the hobbyist is away.
Programming is a simple three-step process. Set the current time by rotating the numbered dial until the selection arrow points to the proper number. Set the working time by pressing a grey dial clip for each hour desired for operation -- each clip represents 15 minutes. Then, just set the TIMER ON, plug the light into the timer, and the timer into an electrical outlet.