HF fluorescent fittings

I fitted electronic ballasts to two four foot double tube flourescent lights in my kitchen. The lights come on immediately with no flickering. In each light fitting a single electromic ballast drives both tubes.

I have a friend who complained her kitchen was too bright (it was) with its twin tube fitting. I tried taking out one tube but the other one then didn't work, so the fitting relied on having both. I later heard that an electrician had fitted a single shorter tube in a new single fitting which solved the problem.

I had one of those double 8 watt fittings, and soon discovered that in effect they never used the filaments at all, they simply joined the two free ends of the tubes together and then put the voltage up across them till they struck and they n reduced it to its normal running level, Not too sure that would work on large tubes though!

Brian

Brian Gaff (Sofa) formulated on Tuesday :

That's how it works on the larger tubes too.

Is she a vampire? Artificial light never gets close to sunlight, etc.

Sounds like it needs both tubes to complete the circuit. I'll risk the £5 or so :-)

Thanks to all who replied.