The clear casing allows for optimal lateral light emission. Centrally integrated large reflector. 18 mm slim. Only 50 g. Two super bright LEDs create a dual light source. Two patented light systems emit two strips of light. The effect: a brightly shining light area that can be perceived from great distances. Please note this light is designed for use with either the 50 Lux or 70 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.