I found out recently that you can use the relocator to pick up the little critters that run around the different biomes and started to make a collection. Then i picked up a couple of the glowing blobs from the bioluminescent biodome and had an idea to use them as organic lighting on my ship. Did quick test last night and it works well as lighting and I think looks a little bit cool. I am now on a mission to hunt down as many of them as possible so i can keep using them as lights.
There's also those little rainbow crystal critters from prism biomes, and a blue variant of the critters you captured. If you want green light, there are crystal critters in geode biomes that give off green light.
I did run across some of the blue ones, but i haven't come a cross a prism biome yet, will have to keep an eye out, thanks
I thought about doing something similar with the glowing jellyfish critters found in some oceans. Good idea!