EYE 66620 - LU400S/HTL/EN - HPS Grow Light - 400 Watt - Hortilux Super HPS - High Pressure Sodium - ANSI S51 - Mogul Base E-Ballast compatible Provides 25% more energy than competitive brands in Violet, Blue and Green Provides 17% more total spectral energy than the competition Provides more spectral balance for increased plant response and accelerated growth