I've got 2 x Cateye Rapd X2 on the back which I'm very pleased with. Less happy about the front light which is a NiteRider Lumina Micro 750. The light is good but I'm not getting anywhere remotely close to the claimed battery life of 9 hours on the lowest setting (no more than 4 in my experience) and 1.5 on high mode. I get about 1.5 in medium mode with a final 10 minute blast at high.