How many lumen does CIO have? Mille Stech Jensen July 08, 2019 07:41 Updated Check the datasheet for CIO through the link below to find exact numbers. Go to datasheet Related articles Data Sheets Can CIO be mounted on a carbon bike? What is the maximum bend angle of the mount? Does the magnet mount on flat spokes? My CIO bike light does not flash? Comments 0 comments Article is closed for comments.