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Running incandescent or halogen bulb with 2/3 or lower voltage possible?

hevans1944

Hop - AC8NS
Jun 21, 2012
4,878
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Jun 21, 2012
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... When during normal use (white) the infrared addition is a much much lower percentage as per the graph (ie. the white light + 10% infrared). ...
Look again at the chart that @BobK posted: it shows radiant energy in kJ per nm. Visible light energy is the area under the curves from about 400 nm to 700 nm. Infrared is the area under the curves from 700 nm to more than 2000 nm. If you measure the two areas, the infrared energy is a LOT more than 10% of the total energy at any lamp temperature. But not to worry, unless you are building a panel with a few hundred lamps occupying a small area. If they glow red (instead of white) you will mainly produce heat... like a portable electric space heater. Nothing to worry about here, folks. Move along.
 
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