Originally Posted by
Wildwood
I always say, 'Consider the source'.
If your co-workers are not cyclists or have never cycled with good lighting at night, then they are not a good source to evaluate your actions.
Remember, most drunk drivers are out after dark.
+1 on the comments regarding familiar roads.
I mainly ride while dark when commuting to / from work, so I always ride familiar roads when dark. Hope there are not many drunk people on the road on work days at 7 pm.