Yes, you can but if we will talk see to that very practically it is not legal (in the US ) the reason behind this is the drones are very small and in dark it is quite tough to spot or see and it may end up with crashing your drones in the dark and will get tangle with some wires or may crash with some nearby buildings apart from this it is very tough to get photos and videos of something at night when the visibility mode is almost zero.