I haven't used LEDs because of being old and obstinate, as well as because of so much conflicting information and the inability to compare apples to Oranges (MH/HPS VS LED) easily. I have a pretty good background in electronics and was considering building my own LEDs at one point. Chinese imports killed off that idea but I always imagined a light panel that had a wide variety of reds/blues as well as UVA/B. The idea I wanted to do was to make the panel programmable, so you could run different combinations of colors, with more blues for VG and more reds for flowering...but variable over time, mimicking what actual solar wavelengths do over the period of a 6 month period. Simple, foolproof connectors, an easy to use graphical interface, and maybe a small sensor setup module that could measure temps, humidity, and other factors that folks want to know. Variable brightness. Make it computer interfaceable to allow networking and easier data acquisition. An entire computer assisted growing program would be a good idea, although I'm sure someone has figured one out by now...probably China.