Key shortcut to see light levels : r/minecraftsuggestions
MC-158025] Sky light level always at 15 - Jira
Light – Minecraft Wiki
Light level help.....Anyone know how to fix when I remove a block it leave a light level of 0 until I place a torch and update it?...please help...thanks :) : r/Minecraft
1.11 bug - light and slabs - Recent Updates and Snapshots - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
How to see light levels for monster spawns - Minecraft - YouTube