Re: Lights at night
Any kind of WHITE light kills human night vision.
When I used to Night Fish for Walleye's, in Minnesota, I took great pains to keep the anchor light (white) out of my field of vision but still visible to other boaters.
We used RED lights, inside the boat cockpit, for visibility for baiting, changing lures, etc.
People tend to think that light is their friend at night. Nothing could be farther from the truth.
Humans, actually, have pretty good night sight. The trick is to not look directly at what you want to see. Use your peripheral vision. The night (dark) seeing sense, in our eyes, is much more pronounced in the peripheral. It's a Rods/Cones thing in our eyes.