The Trojan 650651 UV filter system accepts the following UV lamp replacements:
The Trojan UV Max H - Ultraviolet Water Filter System disinfects drinking water and reduces harmful bacteria, viruses, and Cryptosporidium and Giardia. The Trojan UVMAX H system features CoolTouch fan/valve for water temperature reduction and Easy Quarter-Twist Assembly for your convenience. The 140 watt UV lamp of this UV water filter system provides nearly twice the output of standard lamps and will last for up to two years of service.
Trojan UV Max H - Ultraviolet Water Filter System specifications: