Electronic Ballast Guaranteed to Work with Advanced Water & Air GL650/4 Replacement UVC Light Bulb Arc Length_12 Inches This replacement germicidal bulb has

This replacement germicidal bulb has a medium bipin (2 pin) base on both ends that is used for air purification

which makes this light very useful

The four pin germicidal bulb is used in germicidal OEM Water sterilization filters

25 inch lamp bulb has a tube diameter of 26mm and exceeds OEM standards of bulb performance and is compatible to the following part numbers:

Electronic Ballast Guaranteed to Work with Advanced Water & Air GL650/4 Replacement UVC Light Bulb Arc Length_12 Inches This replacement germicidal bulb hasUV 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