On Sun, 6 Jul 2008 15:18:28 +0100, "Arfa Daily"
wrote:


"Jeff Liebermann" wrote in message
.. .
On Sun, 6 Jul 2008 02:08:27 +0100, "Arfa Daily"
wrote:

Potential fire hazard, or am
I just being paranoid ? Does this need bringing to someone's attention ?

You might have a point, however I find it odd that you're using a 75
or 100 watt incandescent bulb in a desk lamp.

You're mis-understanding me, I think. I'm not using a 75 or 100 watt bulb.
I'm using a 60 watt bulb, as specified for the lamp, and always have done.
Up until now, they have always been the 'standard' tennis ball sized type.
The smaller ones that I have been buying lately, are still rated at 60
watts, but in my opinion, put out the *heat* of a standard-sized 100 watt
bulb.

Sorry. I misread your comments. I'm not sure where I got the 75 to
100 watt bulb.

Despite my screwup, the rest is still applicable. Did you read:
http://rabi.phys.virginia.edu/HTW/page1.php?QNum=1042
If the smaller bulbs are halogen filled, that would explain the
increased temperature.

Also, note that the easiest way to increase the temperature of a light
bulb surface is to simply decrease the surface area of the bulb. It's
exactly like a heat sink. If you have a heat source that beleches
some number of watts, a large surface area will be cooler than a small
surface area. Since the article indicates that halogen bulbs REQUIRE
a much hotter bulb temperature, a smaller bulb diameter, with a
corresponding smaller surface area, will be the way to accomplish
that. Methinks it all fits.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558