Control over mob spawn light level

Is it already possible or being planned to implement in MCPE/Win10 Add-ons to make it possible to control how much light is it necessary for a mob to spawn? I've been searching for such a thing but only thing I found is this suggestion at MinecraftForums:

http://www.minecraftforum.net/forums/minecraft-discussion/suggestions/89719-control-over-light-based-mob-spawning-via-gamerule

The post pretty much says everything, but I think this would be better if possible via Addons rather than commands. As a TLDR:

Basically, I am suggesting a command that can raise or lower the light level for hostile mobs to spawn. This would let you have them spawn in caves but not at night, and make it so that you need to place light sources either more or less frequently than normal, among other things.