Retro Reflective Tape works by reflecting light back to the light source only. In other words, the tape only lights up for the person with the light source or in line with it. The word 'retro' is the key to understanding the difference between a reflective surface like a mirror, and a retro reflective surface like a bike or automobile reflector. Retro means to go back or backward. In the reflective tape industry it means to return light back where it came from and no where else. Retro Reflective Tape is made available by us for commercial uses.