It's not a technical issue. I have a TNT Ultra2, and I've cranked the brightness and gamma right up to the point where everything is almost washed out. Anyways, I don't expect to be able to see clearly in night or bad weather. That's fine. My point is those conditions are too prevalent.
It may not be completely night for very long, but the onset of night or the "dusk" is almost as hard to see in, so I include that in dusk/night. It's a considerable period of time.
Is there a scheduled rotation of day/night? How long are the periods of each, etc. ?
bowser