24" Reef Light 3w LED Bulbs Aquarium Coral Growth Lighting 50 watt 50 Watt useage equilivent to 135 watt metal halide output Extremely low heat output with no heat footprint at water level Lasts 10 times longer than conventional lighting Focused light output that reaches into 36 inches of water depth More useable light for photosynthesis than halides or T-5 fixtures