A good reason for a flashlight.
In my martial arts studies we did a fair bit of night "scouting" and fighting. The most important part of seeing in the dark is NOT staring directly at the "object", but to the side. Keeping the object in the middle use the "clock" to watch outside the center, moving from point to point in a circle. It takes practice, and I don't expect many people besides pilots and "Ninja" to do it. Rant over, just felt I should mention it.
"Today is victory over yourself of yesterday; tomorrow is your victory over lesser men." - Miyamoto Musashi
[Insert random irrelevant religious quote here]