I use a zetlight Qmaven on my 50 gallon and have had good luck growing softies and LPS. Getting ready to try my hand at SPS after i dial it in with a PAR meter but those were affordable when i bought it a few years ago. Also i just saw a youtube video by Bahamalama corals, he toured a large tank that uses $100 amazon lights to grow a beautiful mixed reef. Their are options out there, keep in mind lighting isn't everything...you can be successful with amazon lights or raidions a lot of other factors are more important (Flow, water chemistry to name a couple). Hope this helps and best of luck with the build.