LineTec optics create an Oval ring of light from a single high power LED around a central reflector. The effect is very distinctive due to its “spatial” shape and enables other traffic participants to better estimate the distance to the bicycle. Please note this light is designed for use with either the 50 Lux or 80 Lux headlight sold separately. We cannot wire just a rear light to your Cytronex System, if only a rear light is ordered this will be supplied unfitted.