If you want to see the Roman ruins and really get a feel of how the city must have looked when the buildings were fully intact during ancient times, then don’t go after dark. Because they definitely were not lit up at night like this. At least not according to the history books.
As long as you aren’t a stickler for authenticity, then you’ll love the ruins at night. The ruins are a little out of the way, but it’s worth it to take a stroll one evening after dinner. But make sure you see them during the day too, especially so you can go inside the Colosseum. That’s one attraction on Rome that can’t be missed.