Erm, your engine seems to be running on wishful thinking now.
Why exactly would Georg make the starting point at such a certain level to confuse us all? Honestly, if I were in charge of city light level default I would've made it a lot higher for it to be actually passively notciable.
I am extremely confident in saying that this may be a small bug with low dips/rips in the heightmap in which the starglow is leaking through.
unless GA is conspiring with extraterrestrials and know about alien bases on the MÜÜÜÜÜÜN!!!