Nothing seems to do it all. I need a 30'x50' tarp and all I can find in the heavy are opaque. You need lights to work under them. I've used the cheaper green which is better, and cheapest blue tarps. I'd like something white like shrinkwrap but I didn't see anything above 40' in my Hamilton catalogue. I see you're using more than one tarp? That wouldn't work with my simple ridge frame I'm using these days.

I don't really have much I want to be doing on the boat this winter so it's ok. But I would like better light again. Any suggestions?