175 Watt BT28 HID Mercury Vapor Light Bulb H39
- Mercury Vapor HID light bulb offers long life and is highly efficient
- For commercial and industrial applications
- Outdoor security lighting
- Large area lighting
- General flood lighting
- Barn lighting
- Parking lot lighting
- 8-5/16 inches (L)
- For use in properly ballasted enclosed fixtures rated for use with mercury vapor bulbs only
- Requires specific ballast (ANSI H39) for correct operation
- Universal operating position
- Suitable for indoor use and outdoor applications when used in an outdoor rated fixture