I have a 1200-260 which is sitting in the garage!
We moved about 4 months ago and due to my travelling schedule I haven't been able to set the tank back up, my corals are with club buddies so its all good.
My thoughts on LED light challenges after using both AI and then switching to Illumina:
With Halide or T5 you pretty much have one parameter you can change; distance of the fixture from the water surface and of course the photoperiod!
Since there are so many more parameters and single nm bandwidth intensity that can be changed with LEDs irrelevant of which brand of light, we all seem to experience difficulties with them specially when we just get the new toy!
Corals need stable environment and once you let them get used to a certain water chemistry or lighting... they are much tougher than one would think.
I lost 2 Acros ( roughly 7" diameter colonies) with AI since I did 100% on the Blues. that wouldn't make the light bad just my own stupidity.
Then got so frustrated that bit the bullet and lost a lot of money and switched to Illumina.
This time I was more careful and no issues. the corals did look pale a bit but eventually came back.
Would I have been able to get the same results from AI and avoid losing all the money? yes, probably! But you all know how personal we get with things when it effects our tank.
The only advice I give my friends at the club either with lighting or anything else( after being in the hobby since 1980s) is ; "Wait"
Just my 2 cents.
This thread has gotten much larger than last I was here, man I have to kill the itch and set the tank back up! Specially that I got every piece of equipment I need as well!!! some items in multiples!!
One of our locals always says; the only successful reefer is the one that hasn't gotten divorced yet! so I had to give it a break!! Will be back in the new year
Cheers,
Dave