I have tried the ones that are supposed to work with a dimmer and they
don't. As you dim them they will flash on and off then extinguish
completely the same the other way.
I was told that I needed a different kind of dimmer and changed it but
that did not work either. I returned the bulbs to the supplier and
explained my problem but they did not offer an answer either, they
just refunded my money.
When incandescent bulbs are no longer available I think dimmers will
be a thing of the past.
In most cases - No. A low energy bulb works on the same principle as a
fluorescent tube. See: http://home.howstuffworks.com/fluorescent-lamp.htm
Using a standard dimmer reduces the flow of electrons between the electrodes
to too low a level to maintain light emission of the gas in the tube.
You can *sometimes* get one to work, dependant on the way the dimmer works,
by turning the dimmer on full (to strike the bulb) and then dim it down. At
around 50% brightness though the preceding paragraph comes into effect once
more and the light extinguishes.
You don't say what bulbs you had but I have had success with Osram Dulux EL
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