The cateye rapid x3 is cateyes most powerful rear light producing a whopping 100 lumens of bright red light you can be seen form over a mile off the twinn cob led strips help to produce some eye catching flash modes and working with great optics the lights beam is broad and wide with 6 modes you are able to pick the best one that suits the weather youre riding or to cope with the remaining battery of the light once the battery has finally run out simply plug the light into your laptop co