Low Profile LED Downlights

[Barney12]

There has been loads of talk about the various low profile LED downlights.

All have small transformers which presumably give off some heat.

Can anyone tell me what the practical minimum height these things need to allow airflow?

 

[Crofter]

You could extend the LV section of cable and mount the transformer remotely if that helps?

[Jeremy Harris]

You can easily work out the heat, as the switched mode power supplies used as drivers for LEDs are very efficient, never worse than about 85% and often over 90%.

 

So, if you had an LED rated at 10 W, then the driver unit will dissipate around 1.5 W or so, not enough to worry about in the overall scheme of things - it will barely feel warm to the touch.

 

I used over-sized switched mode power supplies for our LEDs, and even the largest of these barely feels warmer than ambient temperature after the light have been on for an hour or so.

Edited September 1, 2017 by Nickfromwales
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