[rollei_list] Re: OT: Light bulb for slide viewer
- From: James Richard Tyrer <tyrerj@xxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 18 Aug 2010 13:38:35 -0700
On 08/18/10 12:57, Eric Goldstein wrote:
They run the filament at a higher temperature and produce less heat?
Yes. The higher the temperature of a black body, the higher the
percentage of the radiant energy that is emitted as light. So, less
radiant energy is emitted as heat. The total radiant energy is
determined by the Wattage, not the temperature. I am not sure if the
higher temperature is achieved by using a smaller filament or if it is
due to the insulating qualities of the noble gas fill.
I also note that light of a higher color temperature appears brighter
than a lower one.
--
James Tyrer
Linux (mostly) From Scratch
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