Sonny, what do you mean by "light"? :) mine leather one is about 25-28 lbs, which I consider light. The lightest one is Abetta (~18-20 lbs), but I'd never buy one as it doesn't fit me or my horse. Blue Ridge is pretty crappy saddle (although very light) and slide off the horse.
I know people who are really happy with Big Horn saddles, so you may look into (but they are not very cheap).
I also heard good words about King series, but I've never tried one.
http://www.chicksaddlery.com/page/CDS/PROD/1003/834500 http://www.chicksaddlery.com/page/CDS/PROD/1004/KS8520 http://www.chicksaddlery.com/page/CDS/PROD/1003/WP4000
If you plan on getting one through the Internet, buy one in respectable store, so you can return saddle if you tried and didn't like it (I did it once with Aussi saddle I got).