I assume part of that is because the major coral sellers as well as LFS get special pricing on lighting so cost is a little less of an issue. Also, if you are a major coral grower you likely want to go with something that has been widely used and tested.Thanks for that reply. I do agree that I've seen almost all coral dealers on YouTube etc. use Radion.The why is very simple: Most major coral sellers grow and take pictures of their coral under Radions. If you want to increase your chances of getting the same look then use the same lights.
I have seen this effect first hand on multiple occasions where I bought corals from coral shows and LFSs and then put them in my tank 20-45 minutes later. The corals looked better under the Radions than my AI lights! I have zero doubt their are other lights that also look great.
The Radions output a very pleasing spectrum. LED and lighting technology has advanced materially since the Gen6 were released so I wish Ecotech would refresh the Radions. Since Ecotech apparently doesn’t plan to release Gen7 lights anytime soon, however, I plan to switch to ATI Stratons once the new model comes out.![]()

This is like asking why an Iphone is worth it. Ultimately it comes down to your personal taste.