Biker395, I run a Cygolite Hotshot that I've had for three years or so. A couple of years ago, a couple of motorcyclists passed me on the highway as I was headed in on my ride. I pulled into a rest area to reload bottles, and these guys were there. One of the them commented that he could see my light at least a half mile behind me IIRC. This was an unsolicited comment from them. I was glad to hear it.