ATS-8-246 ,ATS8-246 Aqua Treatment 39 Watt UV Bulb For DWS and ATS UV Systems Effective Hours Rating: 12,000hrs - Ultraviolet Germicidal Light Bulb Used in DWS-15, SE-15, DWS-24, SE-24, FTUV-15, DWS-48, DWS-6-, DWS-80 Length: approx: 33.50" T5 Base Single Pin Bulb Type: T5 Style Quartz Glass