In article ,
Jeff Layman wrote:
On 04/03/20 14:54, charles wrote:
In article ,
Jeff Layman wrote:
On 04/03/20 11:50, Chris Green wrote:
My MIL has bought some light fittings which need a total of 7 G9 LED
bulbs, my first foray to Toolstation and Screwfix tells me they're
expensive!

CPC are better but still quite pricey.

Are there any places to get reasonably priced reasonable quality G9
LEDs?

It doesn't matter, really. G9s were originally halogen bulbs. If you use
a G9 led in a fitting designed for a halogen lamp it will have a short
life as it will overheat, as most of those fittings have nowhere for the
heat produced to escape (even the small amount produces by a 4W led).

In general, they produce less heat than their halogen equivalent, so
where's the problem? Certainly the one on this desk allows me to touch &
hold the metal shade which I could never do withn the halogen one.

See second bullet point of #4 he
https://www.thelightbulb.co.uk/resources/5-reasons-why-my-led-light-bulbs-arent-lasting/

If the led points up in an open fitting, even made of glass or other
poor heat conductor there shouldn't be a problem, as the heat produced
by the electronic power supply in the base of the lamp can escape.
However, if the bulb is fully enclosed, or points down in an
unventilated holder, the heat produced by the power supply in the base
has nowhere to go. If you feel the base of a 4W led in such a holder
after being on for a few hours, you will find it is on the warm side.

After 3 hours, I can even touch the glass envelope. I agree about
temperature in GU10 fittings, of which I have many.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle