Crazy thing happened on my last boat while night fishing. I over did it on LED lighting. I had multi color adjustable underwater, t-top. side & aft lights on. I wanted to make it easy for my kids to see everything. I started getting sea sick. I adjusted the colors and it got worse. It was 2' or less and i typically don't get sea sick in those conditions. I can handle 3-5 all day long.
I think the light focused my attention on deck thus blocking out the natural background and sight distance. I turned off the lights and motion sickness went away.
Has that happen to you guys ?