Finally got around to taking some pics of my dual whelen TIR3 setup. I've hooked them up in alternating flashing mode as you can see in the video. They're mounted on aluminum stock, and I used some power pole connectors. I use four power options, during winter commuting it's connected to the 12V sla that powers the headlights. I added a small resistor (the orange connectors on the rack) to cut down on brightness. Drivers were complaining that they were being blinded. I normally use a small 7 cell nicad, but if I forget to charge it I use an 8 cell AA pack. This is somewhat problematic as it doesn't hold the cells real good. Finally, during the summer I carry a regular 9 volt battery just in case I fine myself in rain or dusk conditions and I want the visibility.

The video shows them running in bright sunlight. They are extremely bright, and the lenses make them visible over a fairly wide angle.

The two whelen units were bought a year apart and they changed the bezel. The new one is on the left. They use very little current for such a bright light. The 9 volt battery will run a single unit for about 15 hours.

The space between them is for a reflector, but I've been waiting for a round tuit.

http://www.tekisp.com/~gene/whelen1.jpg Overview
http://www.tekisp.com/~gene/whelen2.jpgBattery options
http://www.tekisp.com/~gene/whelen3.jpgSimple construction
http://www.tekisp.com/~gene/whelen4.jpg
http://www.tekisp.com/~gene/whelen.aviVery blinky

I bought them from http://www.strobesnmore.com/