I work the graveyard shift and my commute is always dark, you get used to it after awhile.
I feel that night commuting is safer if you have the right gear.
I wear a hi-viz vest and my Schwalbe Marathon + tires have a nice reflective strip as do my handle bar bag, frame bag and trunk bag.

On the rear of my bike I run a Serfas blinky, a Cygolite Hotshot and have a spare Blackburn.
On the front I run a Serfas blinky and 2 Cygolite Metro 300 lights.
They are all USB rechargable.
This set up works great and I am always running 2 front lights and 2 rear lights with a spare front and rear ready to go, so I can really run 3 front and 3 rear if I need to.
I find that cars give me a lot of room and I have been told that I look like a rolling X-mas tree...lol


It is all Psychological once you get used to the dark, rain, snow etc.