Aside from my commutes I ride after my kids are off to bed. I night ride a few times a week during the fair weather seasons. I gear up for winter weather commuting 5 days a week and don't care to do it again at 9PM. Anyway, my wife gets some relaxation time at home and I get some extra miles in. It certainly opens up more training opportunities for me since I race.

Nightime is actually my favorite time to ride and MTB trail riding is blast. Creepy long shadows and white-eyed critters staring you down is just surreal. I use a JetLite Starfire and/or Cygolite Nitro XM.