The bontrager ion 350 rt front light is a compact front light that is bright enough to pick out those horrible pot holes and to also keep you seen to other road users and pedestrians boasting a bright and focused 350 lumens the ion features a strong cree led and a rechargeable battery that gives you up to 10 hours battery life in a flash setting and 15 hours in full beam a fantastic feature is the transmitr for wireless onoff functionality battery status check and mode selection