A lighting unit that reduces the effect of back lighting having a housing assembly containing an elongated bulb having a longitudinal axis which is horizontally aligned; a transparent and central section, the transparent portion containing the mounted bulb and having spaced apart tabs mounted on an inside surface thereof; and a sun shield attached to the housing assembly. The sun shield, which is positioned between a source of bright light independent of the housing assembly and the housing assembly, having a shield portion and a mounting portion, the mounting portion comprising a bracket portion perpendicular to the shield having a fastener receiving hole through which a fastener is passed to attach the sun shield to the housing assembly. The sun shield also provides protruding members on an outside surface, and at least one catch member on the inside surface, whereby the sun shield may also be attached to the housing assembly by placing the catch member of the sun shield over the protruding member of the housing assembly. The sun shield further comprises a piece of opaque film placed between the tabs which are mounted on the inside surface of the transparent portion of the housing assembly, the film being flush with the inside surface of the transparent portion of the housing assembly within which the bulb is mounted.