In article ,
John Rumm wrote:
On 07/11/2016 17:44, Andy Burns wrote:
Brian Gaff wrote:

never been convinced that Halogen are anything but
unreliable current and tend to cook the sockets as well

Thought they weren't good for dimmers, 1) you might not make much power
saving by dimming them and 2) if you run them too cool the halogens will
"coat" the inside of the capsule with silvery deposits?

The halogen cycle requires the envelope run hot enough to work, but a
small amount of (visible) dimming does not drop the power dissipation
that much.

In theatres halogen lamps have been used for many years and are regularly
dimmed.

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from KT24 in Surrey, England