On Jun 2, 9:37*pm, Winston wrote:

You can increase the intensity and shift the color of any incandescent
bulb into the blue region while reducing relative power just by using a
thinner filament. *
--Winston *-- Goofed around with light bulbs as a kid.

True, but the article was about changing the emissivity of the
filament. Note the article started with how they changed the
adsorption of aluminum so that it reflected no light by modifying the
surface so that it had grooves with their size in the order of the
light waves. Then went on to how they were able to make metals have
different colors. So if one modified the surface of the filament so
that it would radiate less IR and more visible light, the light bulb
be more efficient.


Dan