Average Rated Life: 24000 hr. | Brand Name: Westinghouse | Bulb Base Type: E39 (Mogul) | Bulb Shape Type: ED23.5 | Bulb Type: High Pressure Sodium | California Title 20 Compliant: Yes | Color Rendering Index: 25 CRI | Color Temperature: 2100 K | Commercial or Residential: Commercial | Dimmable: No | Finish: Clear | Lamp Designation: ED23.5 | Length: 7.75 in. | Light Color: Warm White | Lumens: 9,500 lumens | Number in Package: 1 pk | Packaging Type: Boxed | UL Listed: No | Watts: 100 watt | Indoor or Outdoor: Indoor Westinghouse (LU100/S54) Mogul Base 100 Watt Clear ED23 1/2 2100K HID High Pressure Sodium Light Bulb provides efficiency and long life up to 24,000 average rated hours. These energy saving bulbs are commonly used in areas where long life is required and color rendering is not critical. For use in enclosed fixtures only, this mogul base high pressure sodium light bulb requires ANSI ballast S54 for proper operation. * * This light bulb contains mercury. Dispose of bulb according to local, state or federal laws. Westinghouse is a trusted, global brand. Westinghouse knows lighting and offers products with exceptional quality, reliability and functionality. Product reference number 37440. | 100 watts, clear finish, mogul base, universal operating position | High pressure sodium HID light bulb offers long life and high efficacy (lumens) per watt | Bulb life of 24,000 average rated hours