Recent fluorescent tube fixtures require correct phasing of the white
(neutral) and black (hot) wires as well as a grounded fixture. There is
some capacitive effect between the bulb and the fixture case that enables
the light to start. If you get this wrong, starting will be unreliable, to
say the least. The old ones didn't used to be this way, I think. I would
re-check the transformer wiring. OR, if you are going to go to the trouble
to pull the fixture, rewire it for LEDs.
> -----Original Message-----
> From:archer75--- via Mercedes
> Sent: Monday, September 19, 2016 10:43 AM
> 2 years ago I replaced he transformers in the four tube light assembly
> over the sink. The last few weeks sometimes one, sometimes two of the
> bulbs on the same shared transformer didn't come on until I twisted one
> of them in its sockets.
> Yesterday I found that just touching the glass in the middle of the tube
> was all that was needed to make it come on. I've done that repeatedly and
> every time the tube(s) light up as bright as usual.
> The only thing I can think of is some sort of capacitance effect that
> lets weak voltage/amperage from the dying transformer ionize enough of
> the gas to complete the circuit.
> The primary cause is probably the Chinese transformer from Home Depot
> since neither of the new bulbs is affected.
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