I have two gen 4 xr15 pros on my 90 gallon and honestly it is too much control for a novice.
I can say I do love how the Radiums make the tank look so cool looking. Corals and More have them on their display tank and the tank just pops with color. Listing to all you guys. I can say for my self that I should not buy them. I can not stop myself from changing things. I have T5 's and I keep changing bulb colors because my SPS colors are washed out.
There are other lights out there that give you control, but without the price tag of the Radions.
The Reefbreeder lights are a good example. You get the majority of the features and performance of the Radions for half of the price. A third of the price if you go with the Radion Pros.
I have not seen a tank that is stunning with these lights over them. I will say that they are a great light for 90% of the population though.
Everytime i look at my kessils i always think about how cool it would be to "upgrade" my lighting so i can control it. I do more research and come to this conclusion... Kessils just have nailed it as far as optimal spectrum. Ironically, this is why i think people go straight for Radions. Everyone loves the control at first.
Us seasoned reefers know this isnt the best option most of the time.
Great minds think alike and I think you kinda hit the nail on the head like Kessil did. Having all that control is great but you can easily misuse all of that control to your detriment if your not careful and very knowledgable about what your doing with it. With the performance of the Kessils and the controller that is now available for them although it doesnt really interface with other existing systems of control, I think Kessil gives everything you need and prevents you to an extent from doing what you dont need.
When I made the move to LED's I almost went with the Radions. Initially they seemed like the bomb. But I am a firm believer in the KISS principal...Keep It Simple Stupid! Kessil gave me that and the control I "really needed", hence I went with Kessil instead of some other trick of the week.