They commonly use a whitewash on glass greenhouses, to reduce the heating by the sun. I have no experience with it either, but I think it is a good idea. Just glass itself is UV light blocker to some degree. Not only do
I think whitewashing is a good idea, I think your neighbors will think so, too. I can just imagine that powerful light, beaming from the "box", and your neighbors wondering if E.T. is visiting!
But I think I would still place some tinfoil inside the door directly above the light. You will capture a lot of light that would otherwise be lost.
I don't know about a
remotely controlled robot arm, but methods for automatically opening and closing greenhouse vents have been on the market for 50 years, and I'm sure backyard inventors have been doing it for way longer.
Sounds like you're all revved up with the project, and you should be!
