Wow, the guy who set up this website

http://nordicgroup.us/s78/

was right about the xenon strobe. Ever since I've been running that strobe behind me, motorists have really given me room, even in the daytime. I really think that running my lights during the day is a lot more effective now. Motorists really take notice of my strobe, tail light and 20W halogen. They frequently wait as I approach an intersection, instead of turning in front of me. This visibility is especially helpful in the late afternoon, when I'm riding with the sun behind me.

As a friend pointed out, there is a difference between being seen and being noticed.