Electronic Ballast Guaranteed to Work with Trojan Compatible - 794109 - 260 W - 61.6" - 4 Stepped Pins HA278-CSD the light bulb provides better

the light bulb provides better water purification

WIFI Sensor allowing full control and monitoring by a  touchscreen remote from outside treatment area

Guaranteed 100% Compatible Replacement Ultraviolet (UV) Lamp - Mercury Wavelength - 9 Inch Arc Length

We do not sell GEW brand lamps

Measured Arc Length: 42

Electronic Ballast Guaranteed to Work with Trojan Compatible - 794109 - 260 W - 61.6" - 4 Stepped Pins HA278-CSD the light bulb provides betterUV 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