The modernistic Array door light system can be retrofitted to any door that will accept a 22-inch by 64-inch glazing panel. It consists of two sliding panels of perforated, powder-coated aluminum placed between panes of tempered low-e glass. A simple interior control knob lets the user adjust light levels by setting the perforations to open, closed, or anywhere in between. Cost for the panel is $600.
ODL, 800/253-3900, odl.com.