[slief]

Any company that creates a comparison chart for marketing purposes and use "poor warranty" under cons for Kessil and Ecotech Radion is selling snake oil. Sorry but that is just ridiculous and couldn't be further from the truth. At least for US based customers. Both Ecotech and Kessil have some of the best support in the industry and back their warranties like no other. Further that, TMC doesn't even offer contact info on their US website so even with their 5 year warranty, who is one supposed to contact? TMC/Tropical Marine Centre makes decent products but they are based in the UK. I used their commercial UV filters for many years before switching to AquaUV.

That said, unless you are in Europe, forget about support. Quality Marine is said to be a wholesaler and doesn't provide end user support so god forbid you have an issue, you are going to be having a good time getting decent support let alone warranty service.

As for their light output. The truth is in the PAR numbers and from what I can see, these are better suited as Nano lights.