For Yas (i havent driven it) - The author of the track would need to put lights in (if not already there) and setup the lighting accodingly. May also need to alter the track depending on how the model is built to ensure lighting works correctly.
i don't think the real-life track is set up for non-headlight night racing. I don't know if they even do much night racing there, besides the end of the 1000km SuperGT. But also, the lights haven't been reassessed for DX11 yet either. They might be a little brighter under DX9
Speaking of, what are some good tracks that have lighting (ala Singapore)? I've been trying to find a good one for a while but can't find any. Would prefer real life circuits, not made up.
@Nibiru has done a good job on his Barbagallo track, subscribe => http://steamcommunity.com/sharedfiles/filedetails/?id=768933002