48" Reef Light 3w LED bulbs Aquarium Coral Growth Lighting 100 watt 100 Watt useage equivalent to 250 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 radiation for photosynthesis than halides or T-5 fixtures