That light is ok, but at only 11w its not very strong, especially if its going to be a 'planted' tank. I missed the boat on this offer, but had I got one I'd probably bodge together some sort of light using a power compact tube, something like an 24w or even 36w, with a reflector (bit like George did over his nano). Nice and strong. About the same price as the Arcadia system too (probably get it cheaper on eBay), although granted it would look a lot less 'sleek' than the Arcadia.
Sam