Abstract: A light fixture apparatus with at least one multi-color light emitting diode (LED) cluster. Each LED cluster preferably includes four differently colored LEDs, or four different color-correlated temperature LEDs, in a single optic defining a foursquare array. A cluster thus arranged thereby promotes thorough mixing of the differing wavelengths of light emitted by the cluster. Further, a plurality of such clusters may be arranged so to enhance or optimize color mixing amongst the plurality of clusters. A series of LED clusters may be situated linearly along a suitable substrate in a luminaire for emitting visible light.

Abstract: A light fixture devised to provide illuminated sign panes for displaying information to nearby viewers, but including both white light-emitting diodes (LEDs) and UV-C LEDs. The white LEDs are arranged in the fixture so as to illuminate transparent/translucent panes upon which helpful information is displayed, when actuated. The UV-C LEDs also are arranged in the fixture so as to disinfect or sterilize the ambient air near the fixture. The illumination LEDs and the disinfection LEDs are independently switchable “on” and “off,” so that a user can controllably illuminate the informational panes, or disinfect the air, or both.

Abstract: A down-light fixture including both white-light-emitting diodes (LEDs) and antimicrobial ultraviolet (UV-C) LEDs. The white LEDs are arranged in the fixture so as to illuminate surfaces, e.g., items in a room of a building, when actuated. The UV-C LEDs also are arranged in the fixture so as to disinfect or sterilize the surfaces/items in the same room. The illumination LEDs and the disinfection LEDs are independently switchable “on” and “off,” such that a user can controllably illuminate surfaces and/or objects, or disinfect surfaces and/or objects, or both illuminate and disinfect.