don't know about standard, but you certainly need bike lights for riding at night.
when i get back to commuting (second week in September) i will need them, so Cavalletta is at the shop getting outfitted with some powerful lights.

I have ridden in the dark before and without good lights you can hurt yourself.
Unlike a car (with headlights) if you go over a pot hole in the road or any small obstacle, it's no big deal, but on a bike, you can go down or wreck your tire.

so you do need good lights for riding.