Complete biOrb LED Light Kit for the biUbe, and 8 gallon and 16 gallon biOrbs.Features:2 x Daylight LEDs. 1 X Moonlight LEDThe built in timer automatically simulates a natural light cycle in your aquariumSix timer options to choose fromThe default timer option is as follows. The single LED blue moonlight will fade into the two daylight LEDs over a one hour period. After eight hours of daylight it will then fade back into the moonlight over a 1 hour period. Then, for 14 hours only the moonlight will shine.LEDs will last for yearsDo not need to be replaced like halogen, incandescent or fluorescent bulbsVery safe. 12 volts.