Awesome LED backpacks by Korean designer Lee Myung Su has been designed to to flash in the same manner that peddle powered LEDs on bikes do at night, but these designs also afford their biker wearers the ability to signal to cars which way they are turning - adding another degree of safety. These lights are not peddle-powered, however, which detracts from their sustainability score; but on the bright side, they *are powered by rechargeable batteries.
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