Standard HPS, Hortilux HPS, and Conversion MH-to-HPS Grow Bulbs

High Pressure Sodium grow bulbs produce red spectral energy for flowering and fruiting growth stages. HPS bulbs are also the best light source for secondary or supplementary lighting used in conjunction with natural sunlight. Choose standard HPS 2100 Kelvin spectrum, high output enhanced blue/violet spectrum, or enhanced red spectrum.