If I had a pool I would totally try this out. Put a glow stick in a balloon for pool lanterns. Pool party on a Summer night! I think this could work pinned up on the fence of a backyard without a pool, too, so really great idea for any outdoor BBQ/party!
Transfer a Photo onto a Slab of Wood: cover wood with gel medium; place paper picture-side down; firmly smooth out all bubbles; let dry overnight; gently rub wetted paper off; clean all paper residue off; cover with mod podge; let dry;