Parking lights???
Reply #7 –
My motorcycle has a park position on the switch. It turns on just the taillight when it's parked. I guess it would be useful if you park in a pitch black place so you can find the bike, but I've never parked anywhere I couldn't see my bike. 
Parking lights are also called marker lights. I thought they were to help other drivers see where the corners of your car are located better at night.