These were the first lights I had for my tank and I hated them. Setting them up for corals was a pain and after two months one of the units went bad. I had a BTA that was doing terrible and I replaced the lights with two Red Sea Reef LED 90s and they are awesome. The BTA perked up and I had coral growth finally. The instructions were hard to understand I think because they were poorly translated from Japanese to English.
This is a pic with DsunY lights
This is a pic with Red Sea Reef LED 90s. I think it looks so much better.
I was however able to use them for my refugium and they grow chaeto like crazy so that is one plus.