Movable light leaking through BSP and static mesh

For example this is a flashlight object. If I set it on movable then the spotlight gous through walls. But If I set it on static I cant simulate physics. How to go around this?

Change the shadow Bias and Shadow Sharpen Filter values → this will help to reduce any light leaking. + take a look at this thread: A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums

My problem is different. The amout of leak does not change with distance.