I think his issue is of possibly overdriving the leds.
Depends very much on the quality of both items.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"ARW" wrote in message
...
On 31/08/2019 09:29, John wrote:
I have a light fitting - bars with slidable lampholders - powered from a
circular transformer.Torroidal?

I changed one halogen for a LED. Can I continue to change all 4 - or will
this cause problems due the reduced load on the transformer?


If it does not work is usually quite easy to swap the transformer.

--
Adam