Have you ever thought about having more insects in Minecraft?, with this simple add-on that aims to better ambience your world by adding fireflies, instructions that are born during Minecraft nights in any biome. How about using them to illuminate your buildings?
Select version for changelog:
Changelog
new lighting blocks have been added, as well as new functions for fireflies
Imo instead of having an entity that has a swarm of fireflies in the model, I think it might be better if it were to be an invisible entity (with the "runtime_identifier": "minecraft:armor_stand" to remove the shadow) that gives off firefly particles.
I think this could acheve a more natrual looking feel to the flies :3