Replaces 1000 watt Metal Halide or 750 High Pressure Sodium. Inda-Gro Induction Grow Lights provide your plants the best horticultural lighting for explosive growth and high yields from a single lamp source that is used for the entire vegetative through flowering cycle while saving between 60-70% of the energy consumed by traditional lamp technologies. Inda-Gro Induction lamps are a type of High Output Fluorescent lamp that are known as Electrode less Fluorescent Discharge Lamps or EFDL for short. Unlike conventional lamps which require screw in sockets or pins to power up the lamps, the EFDL induction lamp does not rely on a socket or pin connection to power the lamp. Instead EFDL efficiencies derive from being powered by a high frequency electromagnetic field. Without the use of pins, sockets or ballasts to operate the lamp, more energy is converted into usable plant light and not wasted due to the high temperatures and escaping gas inefficiencies that is inherent of lamps requiring electrodes..