Electronic Ballast Guaranteed to Work with Ultra Dynamics - 7001-821 UV Light Bulb for Germicidal Water Treatment U1003392-422 This replacement bulb is guaranteed

This replacement bulb is guaranteed to last at least 600 hours

After running the unit for a cycle

Guaranteed Replacement Ultraviolet (UV) Bulb - 4 Pin Single End - Amalgam Base - 330 Watts - 59

High/Low output manual switching

Electronic Ballast Guaranteed to Work with Ultra Dynamics - 7001-821 UV Light Bulb for Germicidal Water Treatment U1003392-422 This replacement bulb is guaranteedUV ballast guaranteed to work with your UV germicidal system Features: Guaranteed to work with your UV Germicidal Bulb. Comes complete with wiring diagram necessary to run your bulb(s) Industry leading 5 YEAR WARRANTY UL Listed Ballasts can be complicated. Nobody replaces ballasts regularly. Inevitably, ballasts are needed when you go to change out the UV bulb at your machine's recommended intervals when you realize that the new bulb is not lighting