Efficiency of Light Bulbs
For more details on this topic, see Luminous efficacy.- Incandescent light bulb: about 2%.
- Compact fluorescent lamp: about 7%-9%.
- White light-emitting diode (LED) about 4%-18%.
Read more about this topic: Electrical Efficiency
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—Samuel Goldwyn (1882–1974)
“So doth, so is Religion; and this blind-
ness too much light breeds; but unmoved thou
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And the right; ask thy father which is she,
let him ask his; though truth and falsehood be
Near twins, yet truth a little elder is;”
—John Donne (1572–1631)
“The wide wonder of Broadway is disconsolate in the daytime; but gaudily glorious at night, with a milling crowd filling sidewalk and roadway, silent, going up, going down, between upstanding banks of brilliant lights, each building braided and embossed with glowing, many-coloured bulbs of man-rayed luminance. A glowing valley of the shadow of life. The strolling crowd went slowly by through the kinematically divine thoroughfare of New York.”
—Sean O’Casey (1884–1964)