Have u thought about doing a stained glass piece? That would allow the light in in fun bright colors but be pretty good for keeping Peeping Toms away. I've seen little pieces of stained glass that can be put up over windows and you dont have to replace the actual window glass. Hope that helps!
That's super helpful! I'll definitely check into it. I have to make sure that whatever I do isn't permanent since I'm renting. Thanks for the suggestion!