"Dave Plowman (News)" wrote in message
...
Think it's generally known that dimming a tungsten bulb reduced its
efficiency dramatically. In other words, a 100w dimmed to half brightness
used a lot more electricity than a 50w on full. Although dimming did
extend the life of the bulb.

So how about LEDs? Since they generate far less
heat are they still as efficient when dimmed?

Yes, better actually.

And does dimming make a difference to their life?

With the brightest most heavily driven ones, yep.