The moon comet mkii has been designed so that you are safer and can be seen by all road users the light boasts 50 lumens with a wide beam pattern which is the key to catchings peoples attention the rechargeable light makes for easy and convenient charging simply plug the usb cable supplied into a laptop desktop wall plug or even on the go charging devices the comet mkii is a really versatile light you can change its mode settings to suit the conditions you are riding in or to cope with