Your cage looks great (especially with that lighting). I think guinea pigs can "see" in the dark with their noses, but feel free to correct me if I'm wrong. Do they ever jump out? (For example, they could just jump on the purple stool to get out). Or maybe the grids just look short from the angle perspective...
I love this soooo much! SO SO MUCH! My husband is going to have to take a look at this, and draw inspiration from it for our piggies, if you don't mind. What are the dimensions? wow. And did you use rope lighting? I want this, I want it bad. lol