I have a bunch of identical objects that no matter how many times I lightmap them, they ALWAYS end up being completely black in game. They are firemarble lamp posts, so it would be horribly unrealistic if they weren't affected by the firemarbles they hold. I originally made them all one object for easy lightmapping, but that caused problems and they were still black. Once I split them up and lightmap them two by two it still ends up black. Here's my settings:
