I bought a current USA 36” ic marine light to replace my power compacts over my 46 gallon mixed reef. I choose them Because they were designed to work with the corals I was keeping (Softies and some LPS) as time went on I added another 36” ic marine light for a more power and the ability to keep more light loving corals. the included loop controller and it’s capability to run current USA pumps with a common remote is still a great deal especially for the price.
My experience with them has been very positive. Do they grow corals the fastest? No, but for me with a 46 gallon tank I was not trying to grow birds nest and other sps. If you want to the ability to grow more light loving corals I would suggest starting with a pair of them. Just recently, I decided to try some sps and added a reef brite lumi blue. So far everything is responding well. If you have already invested in current usas, I found adding supplemental lights to be my best option rather than replacing but again I am keeping a mixed reef with just a few sticks. the website and literature for the product is very upfront with what these are designed for so as long as you are realistic with what you can keep with the lights, it can be a very good value. While I love kessils and radions, I was not happy with the ideal Mounting heights nor the 1k price tag. With $400 total investment, i was able to get both lights and included wave pumps, the controller and the lumi light and with it the ability to keep most of the available corals in the hobby.