As promised here is a pic of my light on its bracket. As described in an earlier post the bracket is just 1 1/4"x1/16" aluminum bar bent to form a clamping action with space for the switch in a somewhat protected area. You can see that the part where the light is mounted is where two layers of this light (and therefore easy to work) bar comes back together. The double thickness is sturdy and quite stable enough for this light. The light head is an Optronics QH-8CC driving light available directly from Optronics.com. The light uses a 12V MR-16, probably the most common lamp for low voltage fixtures of all kinds, and therefore easily available in a variety of voltages and beam spreads, from $3-10. Right now I am using a Phillips Energy Saver bulb that draws 20W, but produces light equivalent to a regular 35W. The switch and protective boot are Gardner Bender available from Lowe's. The card for the switch doesn't have a model number, just Toggle. It is SPST rated for 6 amps at 125V. The blue you can see peeking out from under the innertube "skirt" are the sealant-filled, weather resistant wire nuts, also from Lowe's. There were two kinds, super ones that can be buried, $3+ for 6, and the ones I got which were about a buck and a quarter for 6. The gold colored cord will be gone; it was all the store had when I was anxious to get some. I have since gotten some black 18 ga, 2 conductor that I will be using. I will also be using a shorter screw under the light to get rid of that unsightly excess length. Screws/nuts are all stainless 10x24. The black "nut" you can see just a bit of in the corner formed by bar and bracket is actually a plastic know with threaded insert, also 10x24, which is easy to unscrew by hand. I had planned to put one under the light as well, but I drilled the hole just a little to close to the vertical bit of bracket. I plan to fix that on the next iteration so the bracket can be removed without tools.

The battery is housed in a handlebar bag which I have removed for a better view of the bracket. The battery and all connections are also inside a weather resistant bag inside the bar bag for more protection because my bar bag is not waterproof. The plan is for battery and connections to reside in a box on the rear rack eventually.

I can't think of anything else. Questions?
Regards,
Raymond