| http://www.w3.org/ns/prov#value | - As a matter of fact, too cool!: Installing traffic lights with LED energy-efficient bulbs saves municipalities money but may also create a hazard for drivers because the lights sometimes cannot melt the snow and ice that accumulate on them during inclement weather.LED bulbs use 90% less energy than incandescent bulbs, and states such as Wisconsin have seen savings of $750,000 per year.
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