Half the price and they are pretty much exactly the same. For $165 bucks and be dimmable... It's a steal to me. I need to find a smaller unit for my fuge now. I hope to have it all ready by July. I'm getting in fish shipments June 18th and July 2nd to be hypoed. First order will be for green chromis, royal gramma, sunburst anthias, and a helfrichi. Last order will be for a powered blue or yellow tang and an australain harlquin tusk.