Thank you, thank you. You are too kind!
Another source I used was http://nordicgroup.us/s78/. Also, it seems in my area (Atlanta, GA) that Home Depot has only two types of 12 volt sealed beam lights: one is the 25 watt halogen I used and the 2nd is regular 11 watt bulb that Steven M. Scharf (at site above) says to avoid. I think I will have to get the 14 watt halogen on-line (so I can have long run time in winter). I have not tried this system in the rain; we have had very little rain lately (or at least when I might have to ride in it). I'm in the process of making a smaller version for my son's bike using just the stobe and a camcorder battery for power. I hooked the battery and strobe up on sunday and it ran for more than 9 hours.
Gee this fun!