Don't put roo whistles on your car then. They bring 'em running to see what the ruckus is all about. Goats, sheep, wild dogs, horses, cows, rabbits - you name it, if it has ears and isn't a bloody roo it'll run from the roo whistles.
Maybe the stupid skippies congregate on the road to have a meeting about what to do about the noise.
Tim, I've got a hand-held torch that makes my driving lights look pale. Has just 3 LEDs in it, puts out a claimed 4,000 lumen - I turn the thing on and my front yard turns to daylight, the trees down the road and up the hill light up and sometimes I think I can see the 3 wise men heading for Jerusalem with it (that might also be the schnapps).
Have you considered a powerful LED light bar? They have 10W CREE globes now, and I've seen some of the light they put out. Stunning just doesn't convey it well enough.