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The Real Cost of Going Green

By Bloomberg Rankings - 2012-04-20T22:39:48Z

Photograph byGrove Pashley/Photographer's Choice/Getty Images

Company Symbol % Change
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Light Bulbs

Light bulbs make up 18 percent of all eco-friendly purchases for the home, according to a consumer study by market research firm GfK MRI. On Earth Day, April 22, Philips will launch a new eco-friendly line of light bulbs; the most expensive ones cost $60 and last more than 20 years. About $1 billion was spent on energy-efficient compact fluorescent light bulbs in 2008 (latest data available), according to the Natural Marketing Institute.

$14: Sylvania 67533 - Lu400/ECO High Pressure Sodium light bulb -- newegg.com
$21: Pack of three 20-watt CFL bulbs (each equivalent to a 75-watt incandescent light bulb) -- greenhome.com

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