Can you print out a picture from a website onto laminating sheets to peel off the back and use on those glass block lights?
I've never done that, but I would think it'd take the ink a long time to dry and even then, it might not be smear-proof. I've always used the full sheet label paper and then sealed the picture with Krylon Triple-Thick Crystal Clear Glaze (found at Walmart in w/spray paint). I bought the full sheet label paper on eBay a couple of years ago. Got 100 sheets for about $12 including s/h!