Abstract: A method and apparatus is provided that enables the rotational adjustment of a non rotationally-symmetrical optical element in order to change the direction of the emitted light from an LED emitter of a lighting unit or to change the overall luminous distribution pattern in a luminaire including a plurality of LED emitters and optical elements. The apparatus enables simple and accurate rotational adjustment, while providing for the retaining of the selected rotational position of the optical element. The adjustment can be made before or after the installation of the lighting unit or luminaire, and can be accomplished without requiring tools and expert personnel.

Abstract: A housing, particularly for a Light Emitting Diode (LED) or otherwise lamped in-grade or under-water light fixture, is made of ceramic material, such that the housing is not affected by corrosive substances commonly found in soil, masonry, and water that surrounds the installed fixture. The ceramic housing establishes a good conductor of heat and does not conduct electricity. A lens and lens frame are secured to the housing and provisions are made to assure the integrity of the overall assembly even when the light fixture is employed in damp and wet environments and/or where heavy loads can bear down on the lens, such as when the light fixture is embedded in a paved roadway and subjected to vehicular traffic rolling there over.

Abstract: A method and apparatus is provided that enables the rotational adjustment of a non rotationally-symmetrical optical element (24) in order to change the direction of the emitted light from an LED emitter (12) of a lighting unit (10) or to change the overall luminous distribution pattern in a luminaire (30) including a plurality of LED emitters (12) and optical elements (24A, 24B). The apparatus enables simple and accurate rotational adjustment, while providing for the retaining of the selected rotational position of the optical element (24). The adjustment can be made before or after the installation of the lighting unit (10) or luminaire (30), and can be accomplished without requiring tools and expert personnel.

Abstract: A housing for a light fixture comprising a body having a sidewall with a plurality of fin-engaging elements and at least one fin removably engaged with at least one of the fin-engaging elements, thereby providing great design adaptability at modest cost. Preferably, one fin differs from another fin in character such as in shape, color, material or indicia displayed on the surface of the fin. A method is also provided for fabricating a light fixture with selective and exchangeable fins whereby selected placement of the fins around the sidewall is possible.

Abstract: A housing for a light fixture comprising a body having a sidewall with a plurality of fin-engaging elements and at least one fin removably engaged with at least one of the fin-engaging elements, thereby providing great design adaptability at modest cost. Preferably, one fin differs from another fin in character such as in shape, color, material or indicia displayed on the surface of the fin. A method is also provided for fabricating a light fixture with selective and exchangeable fins whereby selected placement of the fins around the sidewall is possible.