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LED pole lights are changing the way cities, departments of transportation, parking lot owners, and sports field managers illuminate their environments after the sun goes down. Compared to incandescent, metal halide, high pressure sodium, fluorescent, and other old lighting technology, LED retrofits are allowing 50% and more reduction in energy costs. Beyond just the cost-savings from lower energy demand of the light source, LEDs work well with dimmers and therefore couple well with lighting sensors so they only output as much light as necessary. As the sun goes down, the light increases, rather than switch on full blast right as the sun hits the horizon.