I have had one other report of this, which we've been trying to sort out. Just a couple of questions:
Is this Prepar3d v4.5?
Do you use Rex Environment Force?
Any other shading/environment tools?
Do you have a Nvidia GPU?
Do you have any Nvidia tweaking tool?
At the moment the other user and I are exploring the affects of EF, which seems to have messed up some people's lighting, and has apparently been patched for this recently. If we can't figure this out, I will supply a way to tone down or remove the dynamic lights.
Nelson lights can appear bright, as the dynamic tarmac lighting was added in an update, but I left the 'lit' night textures as-is. But there's no way it should look like your screenshots:) Here's the comparison shot I took this week, showing how it appears for me.