ive had the fathom led lights for about a month now (had t5's before). I was looking at all the options when i was shopping for lights and a friend of mine on this forum told me to give the guy from fathom a call. I've never had AI'sor Radions nor did i have many corals when I had the lights installed so I can't really comment on comparing brands or growth spurts either. What i did notice right off the bat was the huge difference in clarity and color . Also the customer service which was probably the best out of anything i have ever bought.The owner came by with 4 different units, all with different angles (45,60, 80)just to show me the difference and pros and cons for all. He also measured witha spectrometer the intensity of my t5's and then the fathom led's and gave me exact readings at different depths of my tank. He asked where i planned to go with my tank to provide me the perfect options possible. He also brought over different types of optics and described all of them. I dont remember most of them but to name a few there was diffused, clear, and i think a slightly frosted optics and also described the pros and cons for each one. After finally choosing my options, he installed them over my tank for free. The dude would not take a dollar from me even after i kept insisting. If there are any issues, upgrades, and or software updates, he personally will come over and install it. Now that's customer service you can't put a price on. Not to mention I wanted to buy a 3rd unit and he advised me that it was not necessary and i was getting all the coverage i needed out of 2.
Lastly, he takes some of my rubble rock with him and offers to frag some pieces of stuff that's growing like crazy from his own tanks and bring it back when an update happens.
This dude really has an insane passion for this hobby. And he genuinely cares not only about my satisfaction of his product, but also the welfare ofthe livestock in each of the tanks with his lights. He's a really knowledgeabl eand helpful dude. That's y i went with Fathom LED's.
As for performance, I got a lot of softies in there now and a couple of test sps frags at the top. Gimme a month or two and I'll comment on growth. As for now all i can say is I'm completely satisfied with my purchase as I'm sure other people are whether they have AI's radions or whatever. If you want mol readings i got them written down somewhere at home and i gotta find it . hehe. As for which brand is better? I'm not gonna even go there. I'm happy with what i got and that's all that matters to me.
Happy new year everyone....