Elite LED Tube Lights easily retrofit into your existing T8/T5 fluorescent tube fixture, giving you better quality and longer lasting light. LED lights can last up to 10 times as long as standard fluorescent tubes, use less wattage and are more efficient at directing light down into your aquarium. Great for fresh or salt water, the 36 in. model comes with 32 LEDs, with an output of 7 watts and 640 lumens. The non-electrical end prongs of the LED fixture easily fit into the existing slots for fluorescent tubes to secure in place.