I can't speak to customer service but for my needs and attentiveness to the tank they've been perfect. Controllabality boils down to "fine tuning" the dimmers on top, there are two, one that controls the white channel and one that controls the blue channel and they now have percentages painted around the knob so you have a rough idea of their intensities. When I "tuned" mine I started with a low percentage and slowly turned them up until the corals looked their fullest then left it alone. Then, if you want, you can daisy chain the lights together if you need multiples and only use up two outlets or one dual outlet timer should you use a timer. If not then you can just turn the channels on and off with the rocker switches by the dimmers. I've grown everything from anthelia to acro under these lights and have only had to replace one in the 5+ years that I've been using them, which to me isn't a huge deal considering the sub $100 price tag. So if you don't mind a little wiggle room in regards to fine tuning the channels instead of the pin point control of a radion and no programming in regards to automatically ramping up and down then these lights are great.
How large is the tank? I have 3 over a 150 gallon (the 6 foot one) about 15" off of the water and get good coverage. The only shading is from the braces that separate the tank into 3 sections and that makes a nice little refuge area for me to put softies and other not as light loving corals
I remember getting into T5s back in '06 and UVL/URI bulbs were the go to. The pinks were present in almost every bulb and they looked so good. KZ came out with the "specialty" Fiji Purple like it was something new.
Between the T5s and whichever LED you choose, should you decide to go that route, I imagine that two fixtures should give you the coverage you're looking for. And I think there's a modification video available on the bulk reef supply website as well.
