10,000K High-Intensity T5 HO lamp with strong emissions in the blue spectrum-simulating deeper ocean environments. T5 lights provide more light output than T8s! Ideal for all marine aquariums, reef aquariums, and fresh water aquariums where a deep water effect is desired. Higher lumen output compared to ordinary T8 or T12 lamps. Distributes the light evenly across the water surface. Generates less heat as compared to metal halide lamps. High quality lamp manufactured in Germany. All T5 HO lamps must be installed in hoods manufactured for T5 HO lamps. (This lamp will not work in a regular T8 or T12 type fixture).