Plusrite 2408 MH400/T15/HOR/20K - 400W - 20,000 Kelvin - Aquarium - Unprotected Arc Tube - ANSI M59/E - Horizontal Burn - Metal Halide Lamp Plusrite USA produces and carries a variety of quality products in the Lighting industry Plusrite brand bulbs for great performance Our products are high quality, reliable and durable, Clear