So reading the reviews and specs of this light, it doesn’t look great. Supposedly, despite claiming that each strip is 10 watts, they are actually only 3.25 watts at the highest setting. I’m sure they’ll grow some chaeto, but if you want a really productive refugium, I would go with something else. The Tunze light mentioned above is good, but pretty expensive. I know a lot of people here use the ACKE light I’m using and I haven’t see anyone having any issues with it, most of the reviews on Amazon are from people using it for a fuge light.