Compact Fluorescent Bulbs Die Faster Than Thought California studies say they burn out in 6.3 years, not 9.4 By Nick McMaster, Newser Staff Posted Jan 19, 2011 7:56 PM CST Updated Jan 22, 2011 7:00 PM CST 60 comments Comments Compact flourescents are more efficient than old-fashioned incandescents, but not as long-lasting as originally thought, say studies in California. (PRNewsFoto/OSRAM SYLVANIA) (Newser) – Compact fluorescent light bulbs are promoted as revolutionary power-saving devices—able to produce more light with less juice and last for nearly 10 years. But a review of conservation measures undertaken by California—a state that adopted CFLs more enthusiastically than any other—shows the bulbs to be a little disappointing, reports the Wall Street Journal. CFLs were supposed to last 9.4 years, according to initial projections by California's PG&E, but that's now been revised to 6.3 years. The bulbs burn out even faster in locations such as bathrooms and in recessed lighting, or when they're turned on and off frequently. They're still more efficient than the soon-to-be-gone incandescent bulbs, but considering that California utilities are shelling out $548 million over seven years to subsidize consumer purchases, the less-than-hoped-for results take a toll. "What California has learned, in a nutshell, is that it is hard to accurately predict and tricky to measure energy savings," writes the Journal.