Are the lights waterproof? Mille Stech Jensen November 08, 2017 14:23 The lights have been developed to be waterproof and have been tested for most weather conditions. Related articles Are the lights protected against thieves? Does the light fit all kinds of bikes? What is the maximum diameter that the CIO bike lights can be mounted on? What is the maximum angle for the fork and seat stay that CIO can be mounted on? Legal Requirements Comments 0 comments Article is closed for comments.