White line lighting artifacts

I have search and not found anything like this one. I get lines on the floor walls (don’t recall seeing one on the ceiling yet). Not just here but but in a couple of places. Lighting wise the only thing in the room atm is a point light. This structure is made from BSPs converted to a single static mesh (anychance this is causing it?) I am slowly converting the roughed in structures to standard models but its a long process… Any insight is appreciated, thanks in advance.