White, visible at all times, black at night just doesn't sound good to me at all, I don't have a black one and not saying negative about blak but its just like wearing blak at night just makes you harder to see... That's just my opinion not facts
I have black and have had no dramas at night. They can see your headlights from the front and rear brake lights from the back. I have reflective rim tape so anyone coming from the side can see me. Just don't sit in a cars blind spot as you ride and you won't have as much chance of them changing lanes into you.