Wow, create your own bike lane! Our friends at NiteRider have developed an incredibly innovative safety gadget for you urban TrailblazerGirl cyclists. The Sentinel 40 is a tail light and a laser lane projector. Yes, it actually projects two laser (FDA compliant) light beams parallel to and behind you, essentially establishing a lighted bike lane for cars to readily see you. There is also a 40 lumen tail light with 4 light modes: 2 steady and 2 flashing. Depending on which mode you chose, the run time is between 4.5 hours and 36 hours, and the unit can be recharged in only 4 hours with the included USB cable. The ultimate safety novelty for cyclists!