View Single Post
  #88   Report Post  
Posted to uk.d-i-y
whisky-dave[_2_] whisky-dave[_2_] is offline
external usenet poster
 
Posts: 10,204
Default Auto dimmer for LEDs

On Friday, 25 November 2016 13:59:02 UTC, wrote:
On Thursday, November 24, 2016 at 4:56:25 PM UTC, whisky-dave wrote:
On Thursday, 24 November 2016 16:43:33 UTC, Dave Plowman (News) wrote:
In article ,
whisky-dave wrote:
Low voltage halogen like MR16 not only are more efficient than the
240v equivalant (GU10) but last longer too. As you'd have known if
you'd ever had them.

I was never stupid enough to have them, which is why you rarely see them
as most get them removed. On paper they are more efficinet but most
mount them in ceiling as downlighters where they can;t be cooled
properly so there lifetime seriously reduces. Which is anothe rreason
you don;t see them much now.

Explain how that is relevant between low voltage and mains halogen?


because LV halogen is being replaced because it;s not as good as people thought it was having to use transformers whch usually go placed where you couldn't get to them.


LV halogen is as efficient as halogen gets, light quality knocks even best of LED into a cocked hat.


but not worth putting in if you already have a 240V lighting circiut and all you need is just one or two bulbs replaced every year or so.


Your mixing up the horrendous GU10 con with decent MR 16/11 LV downlighters.


I havent; any MR 16/11 LV downlighters I don;t like downlighters.


GU10, mains voltage MR16, have notoriously poor lamp life, extermely vibration sensitive and rubbish beam control but they looked like nice trendy LV spots but without those hard to understand transformer things.


I don;t want to mount transformers in the loft.