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There are two disadvantages to compact fluorescent lights that you didn't mention in the May 2008 Up Front. One is the approximately 3-minute warm-up that most of the bulbs experience before coming to full brightness. The other is their tendency not to ignite in the cold. I have had some that won't ignite if the temperature is below 15[degrees] F, although if I first warmed them up indoors they then operated perfectly.
LEON KAPLAN YORKTOWN HEIGHTS, NY
In our last full report ("Lighting," October 2007) we found that warm-up times varied depending on the type of bulb. Energy Star-certified ...