Done two night flights, the first of them with northern lights up in the sky. Amazingly cool :) The lights of the city and runway look nice from above.
If you choose to go for a night flight, I think it's worth considering to open a bit higher than normally, and go with a canopy you really trust to open nice and straight. You don't want to have problems at night and to chop your canopy... And as Yuri said, if there is more than one, you really have to know where they are. Be aware and safe.