I made a datapack that adds more cave biomes including a bio light caves biome and the world reads light level 0 unless I place or remove a block right next to the frog lights or any light based blocks
remove dimension file to use bio light caves in single biome or /locate biome minecraft:biolight_caves

think i updated the light in picture at least I think it is normally black first saw it testing the biome in single biome tried other blocks 

uses the ore feature

the zip is the pack