Matches part number #PUVLB515 UVC Output @ optimum 35% 254nm= 47 µW/cm2 High Output (HO) UVC lamp. Fits our Custom UV sterilizer, Coralife, Tropic Marine Vecton V2 400 & Titan & Center Pond UV 15, Fish Mate Large 30W UV, Aquanetics, Custom Sea Life U2 15 Watt Double Pass, Hawaiian Marine Angstrom Model AN-15, Sharper Image Ionic Breeze, and more. Bulb length (not counting pins) 17.25(43.8 cm) Average life: 8000 Avg. Hours