Check this image…
These two are identical, and one works fine, the one of the right is a copy on the one on the left and does some area bs. 
Ermm, i want the spotlight effect, how do you “force” the spotligt effect rather than blurry area effect ?
p.S. Unity Free
Well no response…
Anyway, just setting all my lights to “important” then they render as i want them to.
It looks like one is a spot light while the other is a point light.
Maybe it’s because you have too many pixel lights in your scene and unity reverts one to vertex.
Perhaps in the quality settings you have set to use only a limited number of pixel lights.
Also, maybe it is a shader issue.