It is amazing this thread is still going. But oh well as I said a year ago if you think when you switch from MH to led your electric bill will go down a bunch, keep wishing. Our AC, clothes dryer, washer, stove/ oven, along with water heater uses so much more. The difference for me was when I ran my MH in the summer I would cut down on the length of time versus my LED's today so not to build up the heat in my home. I turned them up in the winter to heat my home and tank, now I use a heater on my tank and my house heater runs more. The biggest question is why is it so much easier to grow coral with MH than LED? Because MH is idiot proof, buy a Radium lamp (which is not 20K) or a Phoenix 14K (which looks like a Radium) run them for 4 hours a day with supplemental lighting for 10 and you have a coral growing machine. The problem with LED is too much tinkering, with running blues at 80%, and whites at 40%, and UV at 10%. Oh yea and do not forget the reds and greens. At the end of the day most LED users have no idea what spectrum their coral is getting, only that it looks good to their eyes. Build my led when they built leds for aquariums sold lights based on kelvin very similar to T5’s. The best light they built and I have four of them was a mixtures of leds that mimicked the Radium lamps. Your only option was to regulate the amount of PAR your corals needed by using a dimmer.
LEDS are saving energy like no other lighting source can. But for all the savings and cutting down of using fossil fuels for energy, on the weekends we Americans will jump on our Harleys, or get into our sports cars, take our ski boats, jet skis to the water and burn 10 times more fossil fuels than our led savings. What happened to when all we had to do was grow a garden, take kid out and play ball in the backyard for entertainment?
On with your arguments, I will check back in with this thread next year.