Are incandescent headlights on their last flicker? They lit the road ahead for almost a century, but interest in incandescence, or light made with heat by pushing current through a thin filament, is going cold.
Light-emitting diodes, or LEDs, promise greater light for less power and waste heat. Already used in taillights and turn signals, the LEDs’ steadily improving efficiency means this technology is moving up to the big job.
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