Light level in dark room at level 13

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. ...