I had a single 160 on my 29 biocube for about a year and a half and never had problems with my lps corals. Branching hammer, trumpets and blastos did well. My sps never seemed happy though. I now have two a160wes that ramp up to 91 percent intensity and 65 percentage color and my sps are doing great. The two light sources help to minimize shadowing. I also know someone personally that used 2 a160s along with 2 t5s on a 40 breeder that did great for 3 years. He now uses 3 a160s and t5s on a 4’ 80 gallon shallow reef and is having great success. They are nice little lights if you stick with shallow reefs and use multiple light sources.