I looked at these ecoxotic 50watt pendants when I was in phoenix last spring, they give off a huge amount of light. They where mounted on a 36" deep tank and easily light up the bottom of the tank, I don't however know what kind of par reading these things have. Although the store owner of reef culture was more than willing to show me the par reading on the other tanks that they had in the store. Quite impressive for sure.
http://reefbuilders.com/2010/09/02/p...-led-lighting/