HORTILUX e-Start Metal Halide is designed for use on electronic/digital ballasts. The starting and operating characteristics of electronic/digital ballasts are different than traditional magnetic core & coil ballasts. These differences allow us to optimize lamp performance over life to improve results in your indoor garden. HORTILUX e-Start is a cost effective line of lamps designed to provide the spectral energy required for vegetative growth. e-Start out performs most grow lamps because of high initial light intensity and consistent output of the exclusive EYE HORTILUX spectrum.