GE Lighting 22575 Mogul Base ED23.5 Mercury Vapor HID Bulb, Deluxe White, 100WHigh color rendering (65 70CRI), much better than standard HPS. GE H. I. D. (High Intensity Discharge) lamps provide high efficacy and low operating cost. The H. I. D. is generally the most efficient light source. Better efficiency almost always means lower operating cost. They also have a long life. Most H. I. D. lamps have life ratings that are better than incandescent lamps and similar to fluorescent lamps. An H. I. D. lamp produces high light