Together, all of the lights, blow-ups, displays, plus the computers that run the show and the FM transmitter peaks at about 500 watts. On average the show uses about 200 watts because not all the lights are on at once. So the whole show uses about half as much energy as a hair dryer when all the lights are on at 100%, and on average it uses less energy than a typical bathroom light fixture.
Read about it here.
Short answer, because the kids love it.
Did you know there are more lights in the Crystal Light Show than there are visible stars in the sky?
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