Electronics 2000

My bathroom 150w/230v Double Ended Linear Halogen Lamp has a very short working life with the constant on/off operations, thermal shock. I’m seeking an electronic dimmer circuit that automatically increases the loading from ‘0’ to full power to my lamp, within milliseconds every time it is switched on. If there is an advantage to reduce the loading slowly when switching off, I would like that to be also included. All contributions welcomed.

I'm sure some of the 'better' standard dimmer switches do this - not the standard diac / triac 'dumb' ones, but the microcontroller based ones. Might be worth checking the MK range as a starting point. You could always put the switch outside the bathroom (set to full on) and feed it from the pull switch since a standard dimmer wouln't be suitable for use in the bathroom itself.

Another thought - is the lamp in an enclosed fitting (presumably so in a bathroom)? I so it might be overheating. Worth checking before fitting a dimmer.

If its the same 150w strip halogen used in outside security lights, then its a waste of time anyway.
these are very hot and bothered and thus short lived .

IMHO Get rid of the thing your flogging a dead horse.

Look for a modern energy saver bulb with GU10 or a MR16 low voltage fittings or even a bog standard globe light fitted with an energy saver bulb

Even a good old flourescent will give you a much even light, consume less electric and last yonks longer (but make sure it has an electronic starter if its going on and off frequently).