minecraft-hexxitminecraft-java-edition
In MineCraft Hexxit you have these interesting ore bushes. They require very low light to grow. I've made a room that is dark enough, but this of course also means the room will be full of monsters after a while. Turning the light on will prevent the bushes from growing.
Is there any way to prevent monsters from spawning in a room without using light?
Press F3, and look for the area labeled bl: When you find this it will tell you the artificial (not natural) light of the block you're standing on.
As you can see on the image bellow, a mob need an opaque block bellow his feet to spawn, so it can't spawn in the air. Also, the light level is only checked at the ground level, so only the floor needs to be lit to avoid mob spawning.
Best Answer
Mobs will not spawn on half-slabs, simply place half-slabs on the floor.