On Sun, 29 Jul 2012 19:25:05 -0700, Jim Thompson
wrote:

On Mon, 30 Jul 2012 10:15:48 +1000, "David Eather"
wrote:

On Mon, 30 Jul 2012 09:53:26 +1000, Jim Thompson
wrote:

Loony Question for Today...

Which produces more HEAT, a 40W Incandescent, or a 40W Halogen bulb?

...Jim Thompson

Technically the incandescent. The both consume 40 watts but the halogen is
more efficient at converting power to light (and hence not to heat). I
said 'technically' because you are unlikely to notice the difference in
heat.

My thoughts, too. I have a fixture rated for three 40W miniature base
incandescents, presently loaded with three 40W Halogens. My
temptation is to go up to three 60W Halogens.

...Jim Thompson
Jim,
Probably not a good idea. Halogens are actually designed to run
hotter, as this activates the halogen cycle that gives them longer
life at those temperatures. If the fixture is only rated at a total
of 120 watts, then that is what it should have. 180 watts of halogens
would run considerably hotter.

Charlie