The moon comet x pro rear light is a super bright 80 lumen seatpost mount rear light that will help to keep you seen on the roads at night featuring a high powered 37v 300 mah rechargeable battery the light has a great run time in whatever mode you are using it in designed for the every day ridercommuter the light is water resistant lightweight and and compact enough to fit in your pocket with ease as well as keeping cars and other road users at bay as the approach you from behind the li