parabellum,
an interesting one about cockpit lighting, if not required off for tactical reasons then by keeping the cockpit as bright as possible/reasonable fatigue can be reduced by as much as 75%, something to do with the brain not releasing the natural melatonin because keeping the lights on fools the brain into thinking it is still day
This is an interesting one which I discovered back on the Vulcan. After a good night's sleep and a social hours sortie, I found myself yawning my head off before I got in the aircraft.
I suddenly realised that the brain knew I was going into a relatively warm, cosy, darkened environment, ideal for a snooze. As a Nav rad of course bright lights were a no no.