This linear fluorescent lay in troffer fixture features a high efficiency Sylvania 4 lamp T8 ballast.  The fixture comes standard with a white reflector, but can be upgraded to a Miro Reflector.  Included is a clear inverted prism lens to diffuse and distribute light, but can be upgraded to a parabolic lens to maximize light output. This fixture is perfect for offices where a substantial amount of light is needed, as this produces equivalent output as a 2 lamp 2x4 fixture.