Lighting channels for skylights would help for streaming levels that include both outdoor and indoor environments.
https://forums.unrealengine.com/development-discussion/rendering/78203-lighting-channels-also-for-skylights
https://answers.unrealengine.com/questions/560358/feature-request-support-light-channels-for-sky-lig.html
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-58369 in the post.