cubicchunks.cfg
line 32: " # In an attempt to fix lighting glicthes over time, cubic chunks will keep updating light in specified amount of blocks per column (chunk) per tick. Default value of 1 doesn't cause noticeable performance drop, but still fixes most major issues relatively quickly."

line 41: " # Similar to Minecraft's view distance, only for vertical chunks. Automatically adjusted by vertical view distance sloder on the client. Does not affect rendering, only what chunks are sent to client."

cubicchunks_mixin_config.json
line 16: " "description": "If set to true, random tick wil be launched from cube instance instead of chunk. Cube based random tick may slightly reduce server lag. You need to restart Minecraft to apply changes."
"