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Sunmaster® Full Nova Metal Halide Lamps is the best all in one lamp: the most objective measurement of total light energy available for photosynthesis. Optimized for use on electronic ballasts. Sunmaster® Full Nova 6,000°K Lamps set new standards in general plant lighting, promoting high levels of photosynthesis without compromise. Pulse start lamp designed for electronic or pulse start ballasts only. These are balanced, full spectrum lamps that is the closet to the sunlight.