GPH515T5L/4P, L-GXO600L 30 Watt UV Bulb Used in Sewage Systems Vf-9, LCS2, S30 Effective Hours Rating: 10,000hrs - Ultraviolet Germicidal Light Bulb Used in the American Water Service / Purtest PT12 ,PT-12 Length: approx: 33.18" 4 Pin Base Bulb Type: T5 Style Quartz Glass