The entire enclosure is constructed of aluminum with a corrosion-proof black coating.  The main light measures 5.75″ x 2.00″ x 0.875″, and the entire unit weighs 1 lb 7 oz.  The fixture is passively cooled.  The power cable is detachable with the power switch located on top of the main housing.

The Hydra Aquatics Retina I comes complete with a mounting arm capable of swiveling at two points.  This allows for height and location adjustment, as well as moving the fixture completely out of the way when aquarist want to service their tanks.  The built-in mounting clamp is designed for frameless aquariums up to 8mm (5/16 inch) thick.

The Hydra Aquatics Retina I is now in stock at Marine Depot for $99.99.  The price is impressive given the metal construction and light output.

Marine Depot also has informed me they will soon have the Orphek (an Advanced Aquarist sponsor) PR-25 and the smaller PR-ML7 in stock.