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The Ultra Sun® Metal Halide (MH) Blue Enhanced Performance lamps offer extra emphasis in the blue and violet spectrums with Kelvin temperatures of 7,500°K and 10,000°K. This line of Ultra Sun® lamps is exceptional for vegetative growth and for the final fruiting and flowering stages of a plant's development. These lamps have been specifically engineered for horticulture applications. Ultra Sun® lamps are high quality, feature robust construction and have excellent reliability at an economical price.