is it feasible to think i will be able to build an led light system for a 60" tank for lets say under $500
Yes, that is the same circuit I used, I think. The difficulty comes from having to handle, mount (electrically isolated, but thermally connected to the heat sink) and get the correct resistors to achieve the current you want for a series of LEDs to match your power supply. The advanage of the buck puck drivers is they are plug and play devices, even though you still have to figure out how to use them for multiple LEDs.is this the kind of driver you made?
whats going to be the advantage of the buckpuck driver?
also what are these 10watt leds that i am seeing on ebay... is that the same thing as the high power led?