Save energy at what cost?

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When driving to Rockford Tuesday to visit Mom I was surprised to see two serious wrecks on Riverside in the stretch from just after Farm & Fleet to Mulford Road. On the way home I could see why. The wind driven snow had blocked the light from the red and green areas of the stop lights. It was a scary situation. Later I heard on the news the lights had been changed from normal bulbs that emit heat to L.E.D. type that are cool and save energy. How many times have we heard public service announcements on various topics say "If only one life is saved it is worth it." Well, is this worth it? Time will tell. I guess one life saved isn't in this case.
Ken