I decided to make some fancy nice lights for my Fuge. I want the fuge to have more than just a little frag rack, so it needs some better lighting. Plus this is a big experiment for new LEDs that may replace my main tank lights. Otherwise I probably would have bought something off the shelf. My fuge is about 50 Gallons, part of a 100G sump system. LEDS Fuge will have two Lumia 5.2 clusters. Lumia 5.2: Each has 5 channels: Channel 1 - 3 Hyper Violet and 2 CREE XT-E Royal Blue (Actinic channel) Channel 2 - Royal Blue (base blue spectrum) Channel 3 - 3 XT-E Netural White and 2 XT-E Warm White (base white color) Channel 4 - 2 Turquoise and 3 CREE XPE2 Blue (enhanced color spectrum) Channel 5 - 3 Hyper Violet (430nm) and 2 True Violet (410nm) (Violet channel) WHY THIS ONE ??? I like the Warm + Neutral white usage in particular, instead of Cool-white. The other colors seem like they will fill in well. Lots of violet. So-so cost at $100 per cluster. But if it does not look good, I have a few others I may test out. Electronics: The APEX will be the main level controller. One channel out, controls overall light level. That 0-10V signal will go to a DIY Arduino board, which will convert that to PWM for each channel. To tune each channel level, I will have a nice simple potentiometer knob, connected to the Arduino. Then normal Meanwell LDD-HW LED drivers, connected to a good 48V power supply.