If you wanted to know if the game makes for power adjustments at night I dare say telemetry would show if the same car was making a little more BHP at Yas at night. I tend to set my cars up with decent handling and braking so I’m invariably quite late on the brakes. The reduced vision at night generally means my laps are a bit scruffy compared to day running. That’s down to me rather than grip but if I nailed every corner I doubt there would be much in it.