guy from yahoo answers wrote:
Anyways, light beers are usually 4.2% -- with the exceptions of Amstel and Heineken Light, which are 3.2% (ABV).
Regular beers, well, the non-light version of the light beers, are usually 5.0% (ABV). Of course, there are thousands of beers with no corresponding light counterpart; light beer drinkers might call these regular beers, but they can range anywhere from about 4.6 to 11.5%. Average microbrew is 6.0%.
Since alcohol is 7 calories / gram, the quickest way to drop calories from your beer is to drop the alcohol. But then, what's the point of your beer? So, companies drop about 16% of the alcohol content, which drops more than 16% of the calories. Then they remove some of the carbs -- which are mostly sugars. This makes a light beer that isn't as filling, and isn't at all natural. It has less impact to the drinker.
Generally, you find that a light beer drinker will drink huge quantities of light beer. Had they been drinking the regular beer counterpart, they would have stopped much sooner. In the end, light beer drinkers probably drink more calories than regular beer drinkers.
Oh, and light beer is generally really cheap and available at gas stations. Popular with college kids, and in drinking games for the previous two reasons.
anyone wanna verify that?