Exclude or delete bright light samples?

We’ve got many dynamic objects inside of a dark room that are extremely bright due to light samples being auto-generated outside of the room (and directly hit by a sun direction light).

Despite several attempts at volume tweaking, we can’t get these bright samples to go away. Is there a way to force an area to not include any samples whatsoever?

For example, a way to completely disable all samples from being generated except inside of LightmassImportanceVolumes or LightmassCharacterIndirectDetailVolumes?

Thanks in advance!
Dave