I shot all of the night footage for my film, "Shadow of the Lotus" on Fuji's Vivid 500T. It's a great stock, very punchy with colors and contrasty. It can get a good image in extremely low light, but you will have noticable grain if it's not lit. I shot wide open at 1.4 on an old 1950's Pentaflex 16 camera. It's a tiny handheld camera, standard 16 as well, and it was the main stock I used for everything except daylight scenes. Too bad it's discontinued but if you can get your hands on it it's well worth it for the colors and contrast it produces.
All the night footage in this trailer is Vivid 500T, standard 16mm, cropped to 1.85:1, so it would be much less grainy if it were super16 and more light was used. I did no grain reduction at all, going for a 1980's Hong Kong action flick look where they shot on grainy 35mm stocks in China. This is as grainy as the stock will ever look, if at all.