This excited vapor emits invisible ultraviolet (UV) light, which is then absorbed by the bulb’s phosphor coating. The coating serves two purposes, both re-emitting the UV rays as visible light ...

In every bulb that researchers tested, they found the protective coating around the phosphor, which creates the light inside the bulb, was cracked, allowing dangerous ultraviolet rays to escape.

In every bulb that researchers tested, they found the protective coating around the phosphor, which creates the light inside the bulb, was cracked, allowing dangerous UV rays to escape.

Repeated exposure to UV light is key to catching those missed particles -- fortunately, it's as easy as flipping a switch. It's also simpler to change a light bulb than an air filtration system.

CFL manufacturers refute the Stony Brook researchers' finding, issuing a statement claiming that "the levels of UV radiation emitted are acceptably low," and the light bulbs are safe for normal ...

But researchers found UV light leaks more from CFLs compared to standard fluorescent tubes because the small diameter of the glass coupled with its twists and turns creates more spaces where the ...

UV light bulbs made of quartz glass cannot penetrate regular glass windows, Todoverto said. The company also is working on developing a robotic version of the UV light tower on wheels.