Frequently Asked Question
This is a BUG of P3D which consider Summer + Day conditions as night. You may observe this problem in P3D main menu when selecting your Time and Season.
It seems to be related to only few days in June.
This won't cause any issues beside lights appearing during day.
It was reported to Lockheed Martin team and we hope this will get fixed soon. The error is related to P3D timezones.