I built two of them in the past with great results. If you care about the look like I did, you can start with buying a 4 bulb T5 light and then modify it to add the LEDs yourself. Below are some pictures of the ones I did for my 40 breeder. Good luck!
This was the first one I built.
This was the second one I built, which worked better than the first because light was more even throughout the tank.