I have lost 4 tail lights so far. One never even made it to the bike it just fell apart. Next one when I hit a bump the lens and leds fell out and before I could get them a car ran them over. Second was a good quality usb rechargeable light. That one I think fell out of my pannier bag on the way into work. Third one was a cheap one that lasted the longest it fell off on a bump tonight. Now I have a rack on each of the 2 bikes, one e bike and one pedal bike I hope to convert one day so a light on the seat post is not a good choice because when I carry stuff it covers the light. So I try to convert the lights to attach to the rear of the rack. This is prob an impossible dream but does anyone make a reasonable rear light that can attach to a rack. They all seem to be made of cheap plastic with very flimsy mount methods. And I do not want to pay a hundred dollars either. I,m thinking of ordering a dozen from amazon.