The Sunmaster 600W dual spectrum HPS grow lamp puts out both red spectrum and enough blue spectrum light to be used as a sole light source throughout all stages of growing. This eliminates the need to buy separate metal halide and HPS bulbs for the vegetative and flowering / fruiting stages of plant growth.
Sunmaster grow lights in particular are specifically tailored for the horticultural market and are some of the best lamps around for growing purposes. Their range of dual spectrum bulbs are an economic and easy to use solution for growers.
