Richard Blackwood wrote:

Once again the hot weather has reminded me of just how much I dislike it!
Last night I noticed the amount of heat given of by my ordinary bedside
lamp - IIRC something like 80% of the energy in light bulbs is heat not
light. It made me wonder whether different bulbs would produce less heat?


A lot more than 80% - more like 95%.


Argos do a pack of 3 15 Watt BC Energy Saving Fluorescent Bulbs for £6.99
These seem to have an ordinary 'bayonet' type fixing. Would these emit less
heat as well as being more efficient?

Yes, they will give out a lot less heat. The only problem with CFs
(compact fluorescents; what these are) is the colour temperature. Many
(most?) of the cheaper ones have a truly horrible spectrum, and
everything end up looking yellow. You need to find some that you are
happy with. Personally I like Phillips ones, and have used them a lot.


--
Grunff