20 recess ceiling light bulbs

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[quote davester]At full power, an incandescent/halogen uses roughly 4 times the energy of a CFL. But, when you dim an incandescent/halogen to 1/4 power, you get much less than 1/4 the light output.
It's more linear than you think:

http://www.lutron.com/product_technical/...#OLE_LINK2