I found a t5 4 bulb fixture for $90 dollars by oddesea on aqua traders. I was curious if the t5 arcadia bulbs would function in this fixture properly. I am guessing it would not matter. I read some posts from reef tank keepers and they were using 10,000k and 18,000k bulbs which is much more than the arcadia bulbs. I was considering using two 46 in 54 watt forest d3 bulbs and two 6500k grow bulbs. My enclosure is very large roughly 8x8x4. It has a circular window in it that lets in a fair amount of light. When I first set it up my plants were just about level with the window. With in a year they had grown to the window and blocked most of the light out. I am about to rearrange his enclosure and refinish it. Last summer I had to battle a severe ant problem. My cham was super stressed from the ants and moving him in and out of his cage for several months during the war. I eventually had to have my the exterior of my house sprayed. No ants now. I am currently using two 75 watt power sun bulbs and two reptisun 5.0 bulbs, but it is time to replace them.