Could it be that my lightmass importance volume does not encompass all objects that contain lighting because i have like a landscape with water material applied and buildings ontop of the landscape but the lightmass only covers the buildings and not the entire scene.
This Swarm Agent/Lightmass troubleshooting guide should help you: A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums
Thanks, that helped, all i needed to do was reduce the size of my lightmass importance volume.