100W LED Retrofit Lamp for replacing HID lamps up to 250W, 120 - 277 Volt, E39 base, Approved by UL for enclosed fixtures, Active cooling is provided by long life "Mag-Lev" cooling fan which keeps LED's cool even when operating within enclosed light fixtures. UL1993 certified and UL1598C classified for USA and Canada. Note: UL1598C keeps UL approval for fixture after ballast is removed or wired past. Available in Daylight (5700K), Cool White (4200K) or Neutral White (3000K).