The revised rapid x is now even brighter now pumping out an impressive 50 lumen of 360 degree visible light the rapid x may look like a normal cateye light but this neat compact rear light offers a level of light intensity like no other cateye visible from nearly 360 degrees and using a neat band fitting system it can be placed in several different positions on the bike from seat post to seat stays ultra bright strip led technology li polymer battery technology up to 50 lumen output compl