Like the title. If it's possible, how to add GNOME Night Light to a standard Ubuntu Unity 16.04?
I have always used f.lux and redshift. They work great and are easy to use and configure. But it looks like gnome 3.24 has the filter built in, as well as Ubuntu 17.10, which is when Ubuntu switched from Unity back to Gnome.
So to answer your question, no I don't think the gnome night light has been implemented in unity.
redshift-gtkis integrated into control panel on Unity.