Nice. Now you need to add some reflective tape (DOT red/white?) to both the back and front of it.

For extra engineering credit, find a way to get all three Superflashes to flash in synchrony. There is some British research showing warning flashes in phase with each other works better. That seems plausible since multiple lights flashing in synchrony should better stand out from the noise of other random reflections, etc. It may also outline the size of an object better. I believe that the strobes on commercial jetliners flash in synchrony, as do the warning lights on radio & television masts & towers or emergency flashers on automobiles.