Just thought I'd share my lighting set-up:

I've got 8 lights total. There is a MARS 3.0 on the seat post, another MARS 3.0 on my helmet, an 1 watt LED headlight on my helmet, 2, 9 LED flashlights on my bar along with 1, 4 LED (I think) flashlight, all 3 of which are quite capable of BLINDING you at 50 feet. Also, there is a Cateye, 4 LED blinkie and a Nightrider Newt Mini-USB light, all on the bars. And for additional visibility, I wear a Fred-vest (aka, safety vest)

Here's some pics.

All of the lights on my handlebars:


All of the handlebar lights plus the helmet light:



I attached the flashlights using hose clamps. It works really, really well, although it is somewhat permanent:




Overboard? yeah, probably. But when I'm dodging 3 tons of steel, I need all the help I can get.