Suggestion idea to increase surface mobs

[tony_is_baws]

Many of the mob-less nights are because of people's unlit caves/mines and dark rooms . Its an possible idea to make mobs only spawn above 50/60 y, so mobs actually appear on the surface. A possible argument is that it makes caving easier , but majority of caves have been explored already that it wont make that much of a difference. Comment any other possible ideas