Skybox, Crafts in Space all much darker after installing 3 new mods

[babale]

Question - I have a whole host of mods applied including MKS, Spectra, EVE, Scatterer, and OPM.
All was great until last night...
Last night I added RealPlume (plus dependencies like Smokestack), Minor Planets Expansion and TAC fuel balancer - just those 3
For some reason ships in space and the sky box all got really dark
Any idea why this may have happened and how to fix?

List of mods:

 

[HansAcker]

As for why it happened after adding mods that should not have any effect on craft lighting, I don't know (maybe the planet expansion adds configs?)
Distant Object Enhancement darkens the Skybox but usually not the craft (see the Dynamic Sky Dimming option):

Spoiler

 

I use Planet Shine, too, but don't use Scatterer. Maybe it does something similar that adds to the effect. The Planet Shine quality settings, however, do have a noticable effect on craft lightin:

Spoiler

 

Edited January 29, 2021 by HansAcker