Electronic Ballast Guaranteed to Work with Aprilaire - 87N77 UV Light Bulb for Germicidal Air Treatment BF4000 The result of this is

The result of this is better productivity

Output uW/cm^2 @ 1m: 136

and consistent coverage

Single Pin Double Ended - 29 Watt Germicidal Air & Surface Treatment Bulb

Total Length: 48

Electronic Ballast Guaranteed to Work with Aprilaire - 87N77 UV Light Bulb for Germicidal Air Treatment BF4000 The result of this isUV 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