|Energy Saving Light Bulb taken by C Ford, 29 June 2004. (Photo credit: Wikipedia)|
As the United States bakes under the summer sun, dermatologists often warn of cancer risks posed by ultraviolet (UV) sunlight. But research now points to a new and ubiquitous indoor source of these harmful rays: eco-friendly compact fluorescent light bulbs.
Scientists say they found widespread chipping or cracking in the phosphor surface coating of nearly all the compact fluorescent bulbs they examined, allowing UV rays to escape.
Most of the bulbs "have cracks in the phosphor coating, probably due to the fact that the coating is brittle and has trouble making the tight bends required to make these bulbs compact," explained study lead author Miriam Rafailovich, a professor of materials science and engineering and director of the Garcia Center for Polymers at Engineered Interfaces at Stony Brook University in Stony Brook, N.Y. "As a result, we observed, by eye, defects in nearly all the bulbs that we studied."