Stumbled upon your mod, but not sure how it exactly works

I wanted to mob prof a basement I'm building that I want to be dark at time since... I don't want it becoming a giant monster spawner. However the mobs keep spawning. I did the crystal in the floor so maybe that's why...

Should this set-up be alright?

Above ground

Bellow Ground:

The entire layout:

Hi! I believe that if you have not changed the default settings this should work fine.
Do mobs spawn in every place of the basement? Maybe there are some corners outside of the horizontal 64x64 range 🤔

To check this use f3+g to see the chunk borders and count 32 blocks in 4 horizontal directions from the center of the crystal. Any place outside of that will be umprotected!

Let me know your findings!