Review on 🚴 Ultra Bright USB Rechargeable Bike Tail Light with Braking Sensor - IPX5 Waterproof, LED Warning Bicycle Flashlight - Auto On/Off for Rear Brake Lights by Roger Diaz

This light is quite bright. It is designed to attach with a rubber strap around the seat post or with the clamp provided to the seat rails. The light unscrews from the aluminum base when it's time to charge or if you don't want to leave the light attached to the bike unattended, which is a nice feature. The charging port is on the back of the flashlight. I ended up having to return the light, not the light's fault, rather I didn't have a place to attach it to my bike due to the nature of the suspension seat, and also I attached a bag to the rack, which prevents attachment to the seat post as they blocks the visibility of the light. I tried mounting it on my helmet but it didn't work because the shape of the back of the light mount is curved and thickened on one edge (to compensate for the angle of the seatpost) which prevented the light from pointing straight back, when attached to the helmet. The light is great for any bike that has a seatpost or mounting rails and if you don't have a rear bag to get in the way. If it were possible to include some sort of helmet mount adapter in the future I would definitely use it.