*Thread Updates* Completion pictures begin on page 4, post #38 Instructional post is on page 6, post #53 (Price breakdown included at beginning of this post) 5 1/2 Month Growth Update on page 10, post #96 Alright, so the time has come for me to jump on this wagon. The benefits outweigh any perceived negative impacts at this point for me. Also, the cost will just about be a wash considering it's about time for MH bulb replacement anyway. Once I have the new LED array over the tank, I can sell my current fixture, and recoup some cost. The bill this will leave me will be little more than if I had just replaced my MH & actinic bulbs. But I digress... My DT is a 125g deep tank (60"x20"x24") Current lighting set-up: 3 250W DE MH's 4 65W PC 420 actinics Here's my LED plan: 60 LED's total, 3W CREE's for all 24 XR-E Royal Blues on 2 dimmable drivers, under one POT 24 XP-G Cool Whites on 2 dimmable drivers, under one POT 8 XR-E Warm Whites + 4 additional XR-E Royal Blues on 1 dimmable drivers, under one POT (this will provide the 'secret kick' in this build) XR-E's will run 60deg optics; XP-G's will run 65deg optics. I will be building 2 array, each with 30 LEDs, on two separate 24"x5.9" heat sinks (heatsinkusa.com). I've decided to hang my array's from the ceiling to provide some additional adjustability. A couple CPU fans will be used over the heat sinks to aid in cooling. Most likely, I will be try to incorporate some moonlights into the arrays, as I have moonlights on my current fixture and I'd hate to lose the night-time viewing. I have a clever way to cover the finished array with a piece of glass or plexiglas to protect the array from my rowdy, splashing fish. To make the finished product look a little better and blend with the room and tank a bit more, I will be having my aluminum components anodized black at a local shop. I have already ordered my heat sinks and a piece of aluminum channel I will need, just waiting on the heat sinks to show up so I can get started. I will do my best to keep a picture blog/build going here, and feel free to ask questions along the way. Stay tuned!