ROCKBROS Bike Tail Light, Rear Bike Light, 5 Modes, Type-C Rechargeable, 1oz Lightweight, IPX5, Aluminum Alloy Bike Taillight for Night Riding

It shines nice and bright

This light is great. It fits your seat post or the under carriage of your seat. It has several different attachments and several different light modes. When I’m riding in the woods, I have it on all the time even if it’s daylight. You can set it to a slow blue that is less intrusive than the red.

Buy this one, it's better than the "auto" or "sensor" style, those did not work and occasionally just turn off. This one is reliable.

This is a good light but I wish it was brighter. Compared to other rear lights I have this is the dimmest. It's definitely not suitable for daytime use. The changing colors is also useless. For the price it's alright.

Easy to install and comes with two different mounts which turned out really nice for me because the two bicycles I have have different kinds of seat posts. So I have one mount on each bike and only take the lamp off to charge. Charges fast. And it's simple to put on and take off. I'd buy it again.

Great little light, only thing I didn't like is that you can't choose the color light. The option for other colors is only a color cycle mode otherwise it does its red light very well.

I can’t express how much I’m happy to have this setup! The light is made with an aluminum case and its shine is perfect. It has multiple modes and is absolutely beautiful. It also comes with additional parts to mount on your seat post if you so desire.

I used knog bike lights for years and loved the quality but had trouble finding any that were reasonably priced these days, so I gave these rockbros a try and couldn’t be more pleased. Very durable and sleek design. I haven’t used them in the rain yet but otherwise they seem legit.