That would work. If it causes any problems, it's easy to remove. The potential issue I see is will you get a blinding strobe effect when it's foggy or snowing since it'll flash right in front of the windshield.
How much wiring did it come with? It looks like they're pre-wired. Do they appear waterproof (or water resistant)?
If you garage your RTV, is it a standard door height (6'8" or so) or is it taller?
If you have the head room to put it on the roof, I was thinking of making a box or something in the shape of a mini light bar. Have 2 strobes forward, 2 backward and 1 out each side. It could be something the size of a shoebox or narrower.
PS. I edited your post as the link entered was bad.