On 28/04/2021 00:14, Dave Plowman (News) wrote:
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? And does dimming make a difference to their life?


Any effect is small compared to incandescent where it's huge, and it
depends how hard you're driving the LEDs in the first place.

Philips has produced some mains LEDs which are claimed to be more
efficient and longer lasting mostly by increasing the number of LED chip
and running them at a lower power per chip. Obviously this costs more.

https://www.mea.lighting.philips.com...mer/dubai-lamp

and Big Clive...
https://www.youtube.com/watch?v=AM2DMuryw_A

'philips dubai led' for Googling

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Cheers
Clive