I have posted in this thread a couple times about the GHL Mitras LED's, and I have to say that I"m satisfied with their performance. I'm a first generation purchaser of the GHL mitras led fixtures (GHL 6100) in 2012. I was a die hard 3x 400w MH/2x 160 watt SVHO coral guy. Sooner or later I got tired of the electric bill and my chiller coming on all the time. Now my corals were vibrant and I will have to say......they will never look as good as that combo....but finances are another issue.
I waited to reduce my electric bill so I focused on my lighting and pumps. Of course I eventually purchased 4 6100 GHL HV mitras fixtures for my 255 gallon aquarium. I have been running them since 2012 on my mixed reef. I had an aquarium crash at the end of 2016, from treating dog dewormer to get rid of blue star polyps. Of course that didn't work ;Nailbiting
BTW, after treatment. They are still in the &^%$#%$# aquarium. Anyway...I purchased a bunch of frags after the crash in Jan 2017 and upgraded my mitras 6100 fixtures to the GHL 7206 pucks (6300) in April or May of this year. My corals have been growing like weeds. The 7206 pucks are allot better than my original 6100 pucks. I really enjoy the color of my corals. Its not MH/SVHO combo, but its nice.
For those of you sitting on the fence wondering if LED's and can grow sps, etc. I will start a build thread to show you my success. These pics here are only from a couple months growth of coral frags from my 6100 lights and the new 7206 pucks. Detailed info will follow in a build thread. A fixture that you can upgrade is a great bonus in this hobby. Here are a couple of top down pics from my aquarium. These are my first pics with my new toy, so they are not that great...but I will get better.
I have no idea what the names of any of the corals are. LOL.
These are just a couple pics of SPS under the GHL Mitras with no other supplement lighting. The key is to set your lighting and leave it alone on led's once you get it dialed in. Of course since I have changed pucks....I have not dialed mine in where I want them

. I tried to post more but its not working, so I will save for my build thread. I really enjoy the fixture and what they offer. They have been working for me since 2012. I don't have all the wifi stuff, etc... but I don't think its needed ...because once you dial the lights in, there is no reason to start changing anything.