If your spotlight is in Character Blueprint, then you just need to cast it once like this:
Of course the “GlobalCharVal” needs to be a MyCharacterBlueprint object type.
Now just drag the GlobalCharVal onto the graph and choose “get”, and then drag off pin from the new “Get GlobalCharVal” node and a window with functions will pop up.
So now from this node you have access to the character blueprint content,
and I assume your spotlight is in there.