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The bulbs on Kennywood's Bayern Kurve shine in a variety of hues, but they're all green to the operators of this historic amusement park on the outskirts of Pittsburgh. In a bid to see if anyone notices, the traditional incandescent lights on this ride and another at Kennywood have been replaced by LED ones, saving money on the park's hefty power bill and greatly reducing the frequency with which the bulbs burn out and need replacing.
Read more from The Baltimore Sun.