Gavita Pro Plus 1000W EL Double-Ended 400 V lamp is one of the best 1000 watt HPS lamps on the market. Specifically designed for high frequency electronic ballasts, it has a connection at each side of the lamp, removing the need for a frame wire inside the lamp. For use with Gavita fixtures only. The jacket of this double-ended lamp is made from quartz glass. Do not handle with bare hands. Oil from your hands can damage the lamp. Warranty applies only if these lamps are operated with a Gavita Pro series ballast.