Lighting not working when I build?

Before I Build my Lighting the ies spotlights work fine however, after I build my Lighting the disappear…
The Geometry is a box brush converted to a staticMesh.


After converting BSP to a Static Mesh, you need to enter a new value of the Lightmap resolution and change the value of the Lightmap index on 1.

I built a scene with a Point Light and add a IES profile and create a Box mesh from the BSP.

Before fix

After fix

It works! Thanks

Noted will do so