I would stick to the cold pressed olive oils. I have always stayed away from refined oils and oils that are extracted with heat or solvents. According to this article light olive oil is refined.
http://homecooking.about.com/library.../aa042897a.htm
I always feel confident about the olive oil I buy at the farmers market. Organic olive oil is great but a bit pricey. So far I like California, French, Italian, Greek, Lebanese and Morrocan olive oils. There are so many to try! Regards, Carol