Electronic Ballast Guaranteed to Work with Tetra - PL-S7W Pond Water Treatment Germicidal UV Light Bulb Model_PT20 ballasts are needed when you

ballasts are needed when you change out the UV bulb at your machine's recommended intervals when you realize that the new bulb is not lighting up or is flickering

4 Pin Stepped on a Single End - 60 Watt Germicidal Water Treatment Bulb

The Replacement Quartz Sleeve for Ultra Dynamics - DW9 UV Light Bulb for Germicidal Water Treatment is an open ended quartz sleeve that works with Ultra Dynamics sterilization filters

The bulb is strong enough regardless of whether you use the Upstream Water Unit in residential or commercial locations

Electronic Ballast Guaranteed to Work with Tetra - PL-S7W Pond Water Treatment Germicidal UV Light Bulb Model_PT20 ballasts are needed when youUV 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