The following excerpt is by Brian Coppa from the website AllLedLighting.com. It has been taken from Coppa's article, "An Environmental Assessment of the SSL Industry". The piece speaks about LED's, and how they stack up against other types of lights in terms of their environmental impact. For the complete article, CLICK HERE.
"The first two DOE reports concluded that LED lamps have far less impact on the environment than do incandescent lamps, and slightly less than compact fluorescent lamps (CFLs) when evaluating the overall energy consumption. Even though incandescent bulbs are less toxic than LED bulbs, they consume far more energy. And broken CFLs continue to be associated with concerns over mercury contamination, even though the levels involved are nearly 100 times less than what is present in a mercury thermometer."