I built mine two years ago and would not hesitate to do it again for another tank. Total cost for a 200 gallon tank was 400$. LEDs are all Cree and Philips Lumileds. Arduino for light schedule. To buy something similar would cost me many times more to get the same quality. What you have to decide is if you want to put in the time to build it yourself. Lenses and spread are not an issue when you control how many LEDs to use and where to place them. I have 12 groups of LEDs which are spread out evenly over the tank, no lenses. If something breaks its easily fixed.