I had this light set for a few weeks and due to the recent snow, I have been taking my bike off more curbs than usual. I think that the jarring of my bike caused the rear light to detach from the holder. I was very disappointed to see that the light didn't stay attached despite the bumps. The front light is still attached. They aren't even that bright. If you're just looking for something cheap and basic it's fine, but don't bother with it if you don't want to replace it when it falls off.