LED traffic lights too efficient
(in Uncategorized on 2009/12/17)http://www.msnbc.msn.com/id/34436730/ns/us_news-life/
MILWAUKEE – Cities around the country that have installed energy-efficient traffic lights are discovering a hazardous downside: The bulbs don’t burn hot enough to melt snow and can become crusted over in a storm — a problem blamed for dozens of accidents and at least one death.
