Day - Night timer The Power Center is a day-night dual timer device that provides complete 24-hour lighting cycles from dawn noon dusk and nighttime. Wave-Maker Application The Power Center can control two sets of water pumps using the alternating timer (total of four outlets) at 15 minute intervals (min.) or more to create a wave-maker application. The two sets of outlets will interchange between each other based on the timer setting. This wave-maker application creates a natural rhythm in your aquarium that replicates ocean tidal movements. Controls 3 Sets of Lights. Dual Day-Night Timers. Alternating Timer. 2-Actinic Outlets. 2-Lunar Light Outlets. Day-Shift Timer. 3-10000K Daylight Outlets. Constant Power. 1-Outlet. Multiple Timer Settings. 24 Hour Mechanical Timer. 15 Minute Interval Setting. Optional Wavemaker Application. Creates Natural Rythmic Waves. Great for switching water pumps to create alternating water currents. Up to 1875 Watts 15 Amp.