Aquascape Light Sensor Photocell with Digital Timer for Pond, Waterfall, Garden, and Landscape Features | 84039 Photocell with digital timer for garden and pond lights Turns lights on and off at desired times Auto On at dusk, Auto Off at dawn or timer options Built-in memory setting saves your programming in the event of a power loss Integrates easily with other Aqua cape quick connect 12-volt components 5-year limited warranty