UV, UV-C Bulb for Purely Products PUVLF435 22 Watt T5 17.5" Effective Hours Rating: 12,000hrs - Ultraviolet Germicidal Light Bulb Base Type: 4pins ONE END, Approx 17" in Length Cross Reference: Purely Products PUVLF435, Aqua Treatment Services ATS4-463 , Aqua Ultraviolet Classic 25 Watt, Aqua Ultraviolet Aqua Fish & Statuary Spitter 25-Watt UV, Atlantic Ultraviolet 05-1523-R, Current USA Gamma 15-Watt Aquarium UV - Q, Current USA Gamma 25-Watt Pond UV, Emperor Aquatics Retro-Fit 25-Watt Savio Skimmer, Hagen Laguna PT-1506 Pressure-Flo 3200 UVC Filte,Ideal Horizons 42022, Pentair Aquatics 20-463, Pentair Aquatics 163512, Pentair Aquatics UV-120; Pentair Aquatics UVBB,PURA UV102, PURA 36002018,PURA UV20, PURA UV22, PURA 163512 , PURA 20-463, PURA 210-200 ,Savio Skimmer UV Clarifier #SUV025 , Trojan UV675 ,Trojan 650143 . Trojan UV605 Bulb Type: T5 Style Quartz Glass