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Old 07-18-2016, 07:22 AM
jjakucyk jjakucyk is offline
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Join Date: May 2016
Location: Cincinnati
Posts: 231
Blown snow on traffic signals is an occasional problem, that's because while LEDs do produce heat, that heat isn't in the beam of light itself, but dissipated via heat sink off of the electronics. I would think there's some way to let that heat get around to the front to help melt any snow, but I guess it's not a big enough factor to really matter. The point though is that sending out a few guys in trucks with air hoses to blow out the signals is still a lot cheaper than the cost of running older style incandescent fixtures 24/7/365. A 12" LED signal head uses only 10 watts compared to a 120 watt incandescent. Since they last so much longer not as many crews are needed for re-lamping, which is another cost saving. They're also quite a bit brighter (notably the reds, allowing red arrows to meet minimum lumen requirements that weren't achievable before in many places, for instance) and they don't burn up the plastic lenses that some jurisdictions used, especially problematic at actuated intersections where signals wouldn't change often.