Battle of the Bulb : February 09, 2008

Battle of the Bulb
Image Data
File Name: 20D_15044
Model: Canon EOS 20D
Lens: Canon EF-S 17-85mm F4-F5.6 IS USM
Date: 02.08.08 10:26pm
Focal Length: 85mm (136mm)
Shutter: 1/4 s
F-Stop: F8
ISO: 200
Ex Bias: +5/3
Program: Aperture priority
Metering Mode: Evaluative
Flash: Off
Focus Mode: Manual focus

Battle of the Bulb

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Last week, we were thinking green with the compact fluorescent bulb. But now we're back to incandescents with this prime 40 watt appliance specimen.

Edison wasn't really the inventor of the light bulb. He was really just the one who perfected it and made it practical for everyday use. Humphry Davy created the first incandescent light over 75 years prior, in 1802.

Most of the input energy to the incandescent bulb is lost as heat (about 98%!), making them much less efficient than more modern alternatives. But there are still many applications that cannot be replaced with compact fluorescents, LED's or halogens.

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