Where's all this light coming from?
My very simple hostile mob spawner has a slight problem. The problem being that the mob spawner doesn't spawn mobs. The basic idea was to have a huge cobblestone box, in which mobs would spawn, fall into a central hole (with the help of water, and then be killed at the bottom.
However, I can't seem to get rid of this strange light in the spawner. There are no torches around; I have checked thoroughly. In fact, the light seems to be coming from the water source blocks. The odd thing is, whenever I force one of the water blocks to update, the light goes away, but when I close up the box and open it again, the water starts glowing again. In any case, nothing spawns.