So here is some footage I took during the Hunter class mount quest.
https://gfycat.com/HoarseSandyFlamingo - Lighting effects in the dark.
https://gfycat.com/VengefulGlisteningGermanspitz - The game at night, for reference, the zone is The Fields of the Eternal Hunt in the Halls of Valor.
I really wish night time in the game looked like this all the time.