In article ,
dennis@home wrote:
The hotter the filament is, the weaker it is, so reducing voltage slightly can help resist vibration to a [to me] unknown extent.


NT


But also reduces the temp of the quartz envelope so the halides have
less effect and cause blackening of the bulb.

I've often read this. But have loads of halogens here fed with dimmers.
And never seen it.

In TV studios when colour arrived, halogens were the standard type of
light. And the base setting was well below full. If they had blackened,
the cameras would have seen it easily. As they are very sensitive to
colour temperture.

--
*DON'T SWEAT THE PETTY THINGS AND DON'T PET THE SWEATY THINGS.

Dave Plowman London SW
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