I would be very, very weary of these units. When I was researching my LED's I looked into these, and the only reviews I was able to find were obvious schills by someone involved with the manufacture of the units. They had a great introductory price, and then got quite expensive afterwards, I beleive they are on a similar price point to the Aqua Illumination units, but with the AI's you know exactly what your getting, not so with the Orpheks
I just looked it up, and 24 inches of Orphek LED's are $900. You can cover that same 24 inch space with a single AI Sol unit if mounted correctly, it costs less, and its a quality product