Stocking up on light ahead of bulb phase-out

Karen DeCoster is thinking of entering the lighting business. DeCoster, a certified public accountant from Detroit, has no experience in the field, but after hoarding 100-watt incandescent bulbs for months, she’s hoping to sell them on Craigslist for a profit. Starting in January, the traditional 100-watt incandescent bulbs that many Americans look to when lighting their homes will become a hot commodity. New federal efficiency standards, passed as part of the Energy Independence and Security Act of 2007, will make the production of these bulbs illegal then, followed by 75-, 60- and 40-watt bulbs in later years.