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Unformatted text preview: W. Incandescent bulbs are about 15 lumen / W, but a fluorescent bulb is closer to 70 lumen / W. A monochromatic source emitting light of around 555 nm in wavelength would be the ideal in terms of efficiency, with all of its radiation being visible to us instead of infrared (waste heat). Credits Numerous Images as well as information were obtained from the following sources:
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This note was uploaded on 11/17/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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