You can buy a Sun Master 1000W Neutral Deluxe MH - M.1000W.U37.NDX conversion bulb and save online. Sunmaster lamps are customized to meet the diverse nutrition requirements of plants at various stages of their growth cycles. Developed by distinguished physicists and leading agricultural researchers, these HID lamps offer significantly more usable light energy and consistently deliver new levels of performance in plant growth. For the delivery of balanced light that boosts flowering and vegetative growth, gardeners should try this Sunmaster Neutral Deluxe grow lamp. It emits balanced light similar to a 4000° Kelvin source, imitating the natural white look of sunlight. It’s an ideal single lamp source for practically all phases of plant growth, vegetative and flowering.