• If you do attach a front light, and somehow cycle at the speed of light, then switch it on...
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    What would happen?

    You would probably crash as the action of switiching the light on at that speed would destabilise you and slow your reaction times which would have to be very fast particularly in traffic. If you were riding fixed, you would also, before switching on your light, autocombust as your legs would be spinning so fast that your jeans or lycra shorts would ignite from the friction. Your chain would probably break as well. Pedestrians could be a problem particularly if it was dark and you didn't have your light on. At that speed a helmet would offer scant protection. Goggles would be a good idea as flies hitting your eyes at that speed would probably blind you.

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