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I love it when people come up with really useful ideas that can not only help people out but make our space much safer. Riding your bike at night is not the safest thing to do but some people have to do it for various reasons. To make their biking time safer is the Xfire Bike Lane Safety Light which is battery powered and clamps to your bike frame and creates lasers on either side of your bike onto the ground. The lines which are basically bike lane lines, will be visible to drivers 1 mile away!! With your headlight and reflectors, this is a good addition to make nighttime riding safer.
Image Source: http://inhabitat.com/xfire-safety-light-lets-you-create-your-own-laser-generated-bike-lane-for-safer-night-cycling/