Philips 400-Watt ED37 Switch Start Protected Metal Halide (3600K) HID Light Bulbs are ideal for both indoor and outdoor applications. It is an efficient, protected "O" rated lighting solution that is suitable for open-rated fixtures. This coated finish, switch start metal halide can last up to 20,000 hours.
- Brightness: 34500 lumens
- Rated average life: 20,000 hours
- Light Appearance: 3700 K
- Energy Used: 400 Watt
- Lumens per Watt: 86
- An efficient, protected "O" rated lighting solution that is suitable for open-rated fixtures
- ED37 bulb shape, exclusionary mogul screw base