SYLVANIA 64418 100 Watt ED17 METALARC PRO TECH Pulse Start Metal Halide Protected Arc Tube 2900K Medium Base White Coated ANSI C98 O Universal Burn MP100 C U MED LED light Bulb These color and power tunable and hard needle tips These color and power tunable fixtures features innovative technology that allows you to choose the color temperature and light output at the time of installation ambient effect The METALARC PRO TECH metal halide lamps were created to fill the need for a safe light source for applications where a protective lens on the metal halide fixture was either impractical or detrimental to fixture design Please note that metal halide lamps cannot be operated without a ballast