I am going to assume for the purpose of this thread that "light beer" is meant as low calorie and has no reference whatsoever to the actual color of the beer. I don't drink lite beer. I usually stick to IIPAs, stouts, some bocks, some helles, you didn't ask what I like so I'll drift back toward the topic now.
Shiner Light isn't bad and the Shiner Espezial Leicht (special light) is pretty good, but I don't think that one is available anymore.
http://beeradvocate.com/articles/248
check out the above article also. According to them the calorie difference between Bud Light and Guiness is only 10 calories. Since Bud Light isn't even beer, and it's only 10 calories, drink what you like. Come on, don't ruin a good smoke with a sh!tty beer. Just saying.