Why does my lighting work in editor, but not in game?

So, I’ve been trying to switch from Lumen to Baked lighting for some of my levels to improve performance. However, I get waylaid at every opportunity. The latest issue? My static lights look like this in the editor:

But when I hit play the lighting changes to this:

Project Settings → Global Illumination method is None.
Project Settings → Allow Static Lighting is true.
Lights are set to static.
World Partition is disabled.
Force no Precomputed lighting is unchecked.
Lightmap Density of the floor here is 1024, increasing or decreasing doesn’t make a difference.
Result is the same regardless of using GPU Lightmass or Build menu.
Build lighting quality is set to medium.
There’s a Post Processing volume, its global illumination method is also set to none.

Any insight into how to resolve my troubles here would be greatly appreciated.

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