Sunmaster SONT+ DS HPS Bulbs are high-performance lamps, which ensure optimum lighting of your grow room. The bulbs produce red and blue spectrum light, which ensure healthy plant growth. Plants require different types of light, depending on their development phase. Growers must provide the correct light conditions for each growth stage. The Sunmaster Bulbs feature E40 fittings, which are compatible with all ballasts and reflectors. The lamp produces light in the right spectrum for high harvest yields and top-quality crops.