Yuck...lite beer.
In Germany, some clubs and/or supermarkets sell Anheuser Busch products, but you will pay a premium for them.
If it is a lighter beer taste you are looking for, try Kolsch bier (usually found in the environs of Cologne / Bonn). Also, some of the Pilsner beers might fit the bill. For low calorie beer...Good Luck. Some of the supermarkets may sell them, but I haven't been to Germany in several months, so I don't know.