Honesty, I don't think it matters. You could be lit up like Times Square and a drunk will still be a danger to you and every other car on the road. Look at it this way---the bitter-enders who stick around to last call have probably been hitting the sauce hard for at least 4-5 hours. At 2 AM, usually the only people on the road are drunks, and people driving home from the swing shift who are drowsy and fighting to stay awake. Then there are the kids who've been making out with their dates in some secluded spot, and their minds are usually not on what's in the present moment.

Still, more lights, the better off you'll be.