GE's Multi Vapor metal halide high intensity discharge light bulbs provide long-lasting performance and good efficacy. The sparkling white light provides very good color rendition versus GE's Mercury Vapor high intensity discharge light bulbs. These HID light bulbs and rated to last 15, 000 hours. Use this 100-Watt Multi Vapor ED17 shape light bulb only with M98 ballasts in downlighting, corridors, lobbies and walkways in retail, commercial and industrial applications.