Do silent fluorescent lights exist, or do they ALL hum ?
I need two 12" / 8 watt daylight tubes to illuminate two stained glass windows recently blocked externally by the construction of an attached garage with the attendant need for 1/2 hour fire rating.
I've installed a pair of lights driven off a dawn to dusk sensor and all works fine EXCEPT the humming of the d**** things - they hum at start up, and it stops if they are tapped - but soon comes back. I assume it's the choke wound with as little copper as they can get away with.
Anyone know of any that are silent?
Andrew Mawson