I recently completed a DIY LED light fixture for my 55 gallon planted aquarium. I have seen a number of articles on the internet on how to build an LED light fixture, and most of them were on marine aquariums. I built one for my planted aquarium using 12 Cree XR-E Q5 emitters that I put into a JBJ light fixture. I also took a different approach when it came to describing LED light fixtures. I decided instead of putting all the information into one article to break the information down into different sections and explore the cost, how do LED's work, what materials will I need, the build, etc. Well the DIY LED light fixture has been in and operating since January 5, 2010. If you have a moment or two take a look at it on my blog.