Sun Room Shades

Whammo-blammo here's another one... got a big enclosed sun room in the back with big-ass S & W-facing windows. it's a perfect greenhouse all winter. Is there any window-shade material that won't let someone see but lets in the light?

Sure, just get reflective tint and put it on the window. Looks like a mirror on the outside. You will lose lumens but if it's already getting plenty of sun, you'll be ok.