The other day I was driving home, I know I shouldn't confess this in the Commuting section) when I saw this intense flashing red light about 100-150 feet ahead. It was on the back of a commuting bike.

Does anyone know if lights like this are commercially available for bikes? It was extremely effective for visability. What are the brightest rear flashers people know of?

I hope it wasn't just a motorcycle light that was modified.

Thanks

Quillfred