It may not be a bad idea. At least complain about the distributor marketing their product without full disclosure. I find dropping the bin nonmenclature to be a bit on the tacky side for a major US distributor.
But since they are the only game in town you got to roll with the punches, just assume the worse case scenerio...that you are getting the lowest grade. I ordered 28 of the five watters and all of them had a Vf of 2.5 or lower. Which means max power is 3.75 watts, not 5. Niiiice.