I went cheap, figured if they were crappy at least I wasn't out a lot of money.
I got the 10 light set from XK Glow.....
http://www.xkglow.com/category_s/78.htm They were $39 at the time when I got them. Anyhow, they come with a "L" shaped piece of aluminum for each light and double sided 3M tape to stick them on. I thought they put out a good amount of light, I ran them on the frame rail in front and behind each tire and in the center front and rear.
I don't have any pics of them installed (and I just pulled them off when lopping the end of the frame off for a stretch) but I did find this one for a size indicator....