How do LED lights use less power?

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Traditional incandescent light bulbs generate light by heating a small filament until it glows brightly. Unfortunately, this means that up to 90% of the light’s energy is lost through heat. LED lights are instead illuminated by the movement of electrons in a semiconductor material, a process that generates very little heat. Much less energy is wasted this way, so the light can achieve the same brightness as an incandescent light while consuming much less power.