I've had just about every lighting option over my tanks over the years. Radium MH and actinic T5 or VHO was always one of my favorite solution.
Modern LEDs will grow anything you want to put under them. That is true for lower end lights that don't blend colors as well as others, and it's true for great color blended lights like Kessil and Radion G5s.
When I ran Kessil A350s, I had some significant shadow issues. The lights made very abrupt shadows, preventing SPS growth on the underside of the branches. I never had this issue with any non-LED light.
I recently replaced my 24" ATI 6 bulb with a gen 5 Radion. I'm VERY impressed with the overal spread and color balance. I almost want to say that it's far better than other lights I've seen (AI and Kessil), but I think that's hyperbole. That said, I think the finer points are much better than those lights, plus the G4 radion. This light uses a lot more LEDs, so the disco effect is almost not there. The color balance can be dialed in to exactly what you want, and shadowing appears to be less of a factor. I say appears because I'm still recovering from a total melt down after a power outage. I don't have any SPS that would give me a first hand account. I think the G5 Radion is the closest thing to a MH/T5 combo on the market with respect to color and blending.
I'm not fan boy yet, but I like it and I'm hopeful. If you consider Radions for your tank, BRS made a very strong case for 3-4 XT15s over 2 XR30s. It's all based on average PAR and the overall spread in the tank.
You should definitely consider these lights in your research. I'm not saying you should get them, but they're worth a look. AI's lights are cheaper, so if you don't want to pay for the little extras the Ecotech light gives, they will grow coral well. So will many other LED, T5, or MH fixtures.
