I work a "normal" shift but my morning commute is in the dark for at least 6 months of the year since I leave home about 6 am. I agree that cycling in the dark is safer in many respects, assuming you have a good light system and bright/reflective clothes. Like you, I run 3 taillights and 2 headlights altho I cut back some during the summer months. I'm also a big proponent of neon yellow jerseys, jackets and vests - that stuff works!