4.50"H Troffer, Linear Fluorescent fixture, Direct distribution. Nominal 1'/2' x 2' and 1'/2' x 4'. Damp Location Rated, cULus Listed. T5 and T5HO Lamping. Non-dimming standard, multiple dimming options available. Lens diffuser options. Recessed T-Grid mounting options. White powder coat standard, custom colors available.