Not all skateparks are restricted to skating during the day. And it's not just the private indoor parks that have lights either. You'll find many public skateparks with lights giving you the opportunity to skate at night. Times do vary between skate spots as to when the lights go off. This is usually a 2 stage process though starting with a dimming. This lets you know they'll turn off completely within 10 minutes or so. So in many places you'll get fair warning.