On Tuesday, 13 March 2018 12:06:23 UTC, dennis@home wrote:
On 13/03/2018 12:00, NY wrote:
tabbypurr wrote in message
...
Any LED is fine if the fitting is open & well vented. In a closed
fitting, LEDs of same light output have a greatly reduced life due to
overheating.

I have a Philips Hue bulb in the light beside my bed: a bare fitting in
a table lamp, with no shade.

The light part of the bulb gets barely warm. The base gets fairly hot:
it's bareable for 10 seconds but after that it starts to become a bit
too hot to tolerate.

And that's with no shade around it, so best-case cooling.


Some shades help cooling by creating convection like chimneys do.

very few