I have never ridden at night with lights. I simply use the IPDE technique they taught me in school when I learned to drive. IPDE=Identify, Predict, Decide & Execute.
I Identify the approaching motiorist.
I Predict that they will run me over.
I Decide to get the hell out of their way, even if I have to pull over, or duck into a driveway and stop.
I Execute above mentioned maneuvers.
I also have extremely good night vision and am familiar with all the obstacles on my routes. I have lived here all my life and drive/ride the roads during the day. If I run over glass etc, C'est le vie!
I guess my other rational is that I would need to buy lights by the case! (20+ bikes in the garage to choose from!)