Screenshot I luckily took before removal of Compatibility Lighting
New screenshot after ‘migration’ to Voxel
The brightness back then was 5 and used to go up to 10 by a script.
So apparently there used to be a Brightness clamp that would limit the brightness to 1, so whether it was 5 or 10, in reality it was capped at 1.
That’s why after the removal of Compatibility I changed the number down to 1, as supposedly that’s what it’s been before.
Now eh… I can’t quite say that these look identical. When I turn up the brightnes to 1.5 in the new situation it appears to match the original more 
Which shouldn’t be possible if there was a brightness clamp?
Anyone happens to have any idea why this is?