Should you encounter an Anti-Shizuma field, you'll be prepared.
Yep, it lights up! No batteries or LEDs. That extra 'something' I added to Prototype II, was glow-in-the-dark powder. Charge it during the day and you'll be ready for the night. With a fresh, direct charge it really glows (as pictured above), but in the Alt image is how it looks after just hanging on my keychain for a couple hours outdoors.
I hope to address the color and bubbles in Prototype III...coming soon.