Bit of a random question but does anyone know if it would be possible to use an LED rear fog light as a rain light with the aid of a bit of circuit board trickery to make it flash?

For a FIA approved light it has to flash at 4hz so could you not use an adjustable flash rate relay?

That's the kind of thing I was thinking of but just wasn't sure if there were other implications people could think of id just not thought about

As long as you can adjust to 4Hz I don't see any issue. Its twice the rate of a normal indicator but I suspect some of the adjustable relays you an get will be fast enough

only if you use it on a track .....anyone who uses fog lights other than when it VERY foggy should be shot and even than they should be whipped with a wet kipper for being very annoying....fog lights would be first on my list for banning come the revolution.