DayZ field wiki · Survive
Night
Time, not a bug
Short answer
It gets dark. That's the game. A lamp is a tell. Moon helps. NVG is jewelry with batteries.
Also: night · dark
How it works
Server time moves. Night is not a broken setting. Indoor dark is ruder. See those pages.
What to do
Move with the moon or sit with a plan. Don't hip-fire a hunting scope as a torch.
Don't
Don't invent an ambient-light number.