Well the rotary ones have to be brighter. It's a survival trait learned in order to avoid being hit by the shrapnel when the bleedin' ugly floppychopters commit sewerage pipe and lay there thrashing themselves to bits and trying to eat their own engines.:}

There you go, then. Thank you Mr Twotter.:ok:

Doesn't say much for the pilots of the unfortunate looking mechanical contrivances, though....:}

The less said about them, the better.