Gavita Pro Plus 1000W EL Double Ended 400V 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.