Unless it works over multiplayer, its pointless for me.
That goes a long way to show how different users are... different.
I'd estimate that even if I fly only ever with MP buddies, for a 90 minutes flight I'll spend perhaps 10 minutes on the ground taxiing. Out of these, perhaps one in external view. There's probably three minutes in which I can potentially see whether an MP plane light actually illuminates anything or not. Provided I fly at night every time, that's 1/30 of my sim time affected. If I insert my actual habits, it's rather closer to 1/100.
On the other hand, I'm going to see the sky the whole 90 minutes - a lot of it in fact. I'll see haze all the time, I'll see many more lights from the distance not illuminating anything in particular.
As a result, I care infinitely more how the scene I see all the time looks than how a particular rarely seen feature looks. Somehow, your statement is equivalent to seeing someone say 'I don't really care how the graphics of this sim looks as long as it simulates a rainbow correctly' (that's another thing you get to see pretty rarely).
Please don't see this as a criticism in any way - you're entitled to value whatever features you like - but just as a quest for comprehension: Why is this so much more important than getting the rest of the scene right?