Westinghouse  ED17  HID Lightbulb  Medium *Watts: 100 watts *Lumens: 8500 lumens *Color Temperature: 4200 K *Lamp Designation: ED17 *Base Type: Medium Base (E26) *Bulb Type: Metal Halide *Product Type: HID Lightbulb *Packaging Type: Boxed *Color Rendering Index: 65 CRI *Bulb Length: 5.4 in. *Average Rated Life: 10000 hr. *Indoor and Outdoor: Indoor *UL Listed: No *Commercial or Residential: Commercial