Smear glow squid ink onto blocks to make them emit light

I think it would be a good idea to be able to smear the new glow squid ink onto a block to turn it into a light source without changing its texture. With the recent addition of the invisible light sources and the discussion about them not being obtainable in survival i think this would be a great survival version of the invisible light source. Perhaps you could even make it so that wet sponges are a tool with which you can see and remove the ink!