So the Glow squid snap just came out and knowing the glow ink sack is what they drop and are used for item frames, what if you could use it for more things? Like imagine using the ink sack to put on leather clothes to make them glow.
Like using it on a tunic to make yourself or other players wearing it illuminate, a portable light source. Now I know optifine has its torch feature that lights up the surrounding area while holding it but could you imagine just wearing the light source, not only could you wear one piece of it but all your leather clothes. The more you wear the brighter the area around you is.
I took into consideration before thinking this. Like "why leather, why not diamond armor or iron?" to that I respond with that the fact leather can be dyed should make more sense for glow ink to work with leather, since its like a paste. Which makes it balanced and not OP, leather armor is pretty weak which means that you would use this for light up your surroundings while building or mining, not combat as much. which would mean you can wear diamond boots, leggings, chest plate but have a leather cap with glow ink on it, as if it was a miners cap but leaving your head vulnerable at that cost.
I think it would be a interesting function and give leather armor a little bit of a better use.