By Canadian Law, we have to have headlight on anytime the bike is running. This has been law for all vehicles here, since,.. '91?
A real pita if you have a weak battery and an old system, like on the b4. As soon as you turn the key that damn light is on and draining the battery as you're cranking.
With the 919, the bike cuts power to the headlight while cranking, then restores it once started.
The parking light ( the taillight stay lit while parked and the key is out of the ignition) is an option on some bikes and not on others. The b4 has it, the old '88 Hurricane my dad rides has it, the 919 doesn't, but I'm sure I've also seen it on some current bikes too.
It's designed to increase visibility when parked, but I've also noticed it causes confusion with a lot of people. I once used it by accident, and came back to a lady going over Dita looking all over, running her hands on the poor girl and such. I walked up and asked her if I could help her (a little abrasively), and she said, "Oh! Your tail light was on, and I thought you might drain your battery, so I was looking for a way to turn it off..."