Just a warning, if you want all the bells and whistles you might find you are better off just shelling out the cash for the production unit. But you can save some money if you go a little simplified and
DIY. I plan to try making a small fisture myself for a 10 gallon some day. You might want to try it on a small scale too first to see how it works out or what the best solution is before you go spend lots of money on LEDs and drivers.