Have you got those wet yet? I don't believe they're intended for direct exposure to water, but I could be wrong.
I've thought about using LED strips to illuminate the red lens in my top case. The proper Givi lighting kit (V90) is not available in the US, and a homebrew LED setup would be cheaper anyway.
I'd need to run more wiring though, and I'm a bit put off by that. I'd need to drill a hole somewhere to run the power & signal lines, which just means another ingress point for dust/water.
Also, I guess I'd need at minimum 2 strips - one for "running light" and the other for "brake light."
Fortunately most (all?) of the SMD LED strips I've seen expect a 12 V power supply, which is easily done on our Vstroms.