Originally Posted by
Koyote
That is a rap against the Cygolites. I haven't bought one in a few years, but they always came with a bracket that could mount on the seatpost OR the seatstay. If you wanted to switch between them (have both options), you had to buy a second bracket.
I like their rear light, too, and bought their Hypershot 350 lumen one a couple weeks ago.
It came with mounts for the stay or post. They improved the clip to make it more secure.
On Amazon for $48. One can buy their less bright versions for less.
But, I'm like you, get their brightest one.