Put the summary of the bug you're having here
I thought the light level would be Block 0 not Block 13
What actually happened was...:
Every time I fix it and then logout then back in the light level goes back to 13 at a spot sometime it against a block, sometimes it is in the middle of the room.
Steps to Reproduce:
1. Logout them log back in.
2. ...
3. ...
Linked issues
duplicates 1
Attachments
Comments 7
No its the opposite, when there are no light sources its showing q light level of 13. and it seams water itself is turning into a light source block.
I am having the same type of problem. Mob grinder I had was working great then after 19w04 it won't work because there is light coming from an unknown source.
Same issue with my mob grinder in 19w11b snapshot world. Added snip of screen from a room totally enclosed by oak planks and cobble. Light levels say 15. Should be zero. Only possible source of light is a half-slab opening 20m below at the bottom of the mob drop pit. When sun rises, mobs at bottom of pit (non-fatal fall for XP grinding) start to burn and die. Should be light level zero down there too despite half-slab opening.
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Sounds more like MC-142228 (https://bugs.mojang.com/browse/MC-142228).
I have had this problem as well as with light sources not working (MC-142134). Both are super annoying and tedious to deal with.
Does MC-142134 describe your issue?