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I believe this is how you time travel. According to Einstein's theory of relativity it is impossible for matter to travel at the speed of light but you can get very very close, so by turning on the lights would in a since slow down time for the car.
Eg. If your where in a train traveling at 99,999..% the speed of light and then you started to run down the train, you would be traveling faster than the speed of light which is impossible therefor time inside the train would slow down.
It sounds mad but this is one of the best time travel theory anyone has come up with.