An exterior aircraft light unit includes a mounting structure, an LED arranged on the mounting structure, and an optical system, arranged on the mounting structure for creating an output light emission distribution of the exterior aircraft light unit. The optical system has, in a first cross-sectional plane extending through the LED, a first concave reflector and a second concave reflector, each of the first and second concave reflectors having a proximate end positioned adjacent to the mounting structure and a distal end positioned removed from the mounting structure, with the first and second concave reflectors being arranged on opposite sides of the LED in the first cross-sectional plane, and a refractive optical element arranged between the first and second concave reflectors in the first cross-sectional plane. The distal ends of both the first and second concave reflectors that curve towards each other and have back-tapered shapes.

An exterior aircraft light unit includes a mounting structure, an LED arranged on the mounting structure, and an optical system, arranged on the mounting structure for creating an output light emission distribution of the exterior aircraft light unit. The optical system has, in a first cross-sectional plane extending through the LED, a first concave reflector and a second concave reflector, each of the first and second concave reflectors having a proximate end positioned adjacent to the mounting structure and a distal end positioned removed from the mounting structure, with the first and second concave reflectors being arranged on opposite sides of the LED in the first cross-sectional plane, and a refractive optical element arranged between the first and second concave reflectors in the first cross-sectional plane. The distal ends of both the first and second concave reflectors that curve towards each other and have back-tapered shapes.

Disclosed is a hybrid lamp assembly (44) which includes a substantially parabolic primary reflector (12) having an open end (20) and a circumferential mounting member (54) extending outwardly from the open end (20) of the primary reflector (12). A primary light source (14) is operably assembled with the parabolic reflector (12). A secondary light source (46), comprising a plurality of LED lamps (48) and a plurality of substantially parabolic reflectors (50) associated with the plurality of LED lamps (48) and configured to project secondary light beams, is positioned circumferentially around the open end (20). The LED lamps (48) each are mounted to project light directed by the secondary reflector (50) with which it is associated. Upper and lower reflectors (50a, 50b) project light beams substantially parallel to the beam of the primary light source (14) and lateral reflectors (50c-j) are angled inwardly in a horizontal plane to project light beams that cross the beam of the primary light source (14).

Disclosed is a hybrid lamp assembly (44) which includes a substantially parabolic primary reflector (12) having an open end (20) and a circumferential mounting member (54) extending outwardly from the open end (20) of the primary reflector (12). A primary light source (14) is operably assembled with the parabolic reflector (12). A secondary light source (46), comprising a plurality of LED lamps (48) and a plurality of substantially parabolic reflectors (50) associated with the plurality of LED lamps (48) and configured to project secondary light beams, is positioned circumferentially around the open end (20). The LED lamps (48) each are mounted to project light directed by the secondary reflector (50) with which it is associated. Upper and lower reflectors (50a, 50b) project light beams substantially parallel to the beam of the primary light source (14) and lateral reflectors (50c-j) are angled inwardly in a horizontal plane to project light beams that cross the beam of the primary light source (14).

Light fixtures having light bar elements therein. In order to mimic the size and appearance of fluorescent bulbs in existing troffer-style and surface-mount fixtures, LEDs are may be arranged on light bars with integrated lenses to both diffuse the light and shape the output beam. One or more LEDs can be mounted, sometimes in clusters, along the length of a base of the light bar which can then be inserted into a fixture. An elongated lens is mounted to the base over the LEDs so that light emitted from the LEDs interacts with the lens before it escapes the fixture. These elongated lenses may be extruded from a diffusive material, for example, and can be shaped in various ways. For example, the lenses may be shaped to disperse more light to the sides, i.e., in a direction away from a normal axis that is perpendicular to the base.

Light fixtures having light bar elements therein. In order to mimic the size and appearance of fluorescent bulbs in existing troffer-style and surface-mount fixtures, LEDs are may be arranged on light bars with integrated lenses to both diffuse the light and shape the output beam. One or more LEDs can be mounted, sometimes in clusters, along the length of a base of the light bar which can then be inserted into a fixture. An elongated lens is mounted to the base over the LEDs so that light emitted from the LEDs interacts with the lens before it escapes the fixture. These elongated lenses may be extruded from a diffusive material, for example, and can be shaped in various ways. For example, the lenses may be shaped to disperse more light to the sides, i.e., in a direction away from a normal axis that is perpendicular to the base.

LED lighting device includes LED light housing including hollow outer shell with planar mounting surface defined inner top side of accommodation chamber to face toward bottom opening and reflector cup mounted accommodation chamber and defining conical reflective surface therein and carrying lens at top center thereof with light exit surface of lens facing toward bottom opening of hollow outer shell, LED light-emitting module including circuit board mounted between planar mounting surface and lens, array of LEDs arranged front side of circuit board and control circuit with driver IC and capacitor thereof respectively arranged opposing front and back sides of circuit board for converting inputted AC power into stabilized DC power for driving LEDS. This structural design effectively increases available surface area of circuit board for circuit layout and related circuit layout insulation distance, allows installation of relatively larger amount of LEDs to increase overall brightness and makes reflector cup replaceable.

A lens member in front of a light source can include: an incident portion dividing the entering light rays into first light rays obliquely upward and forward and second light rays obliquely upward and rearward; a first reflecting surface reflecting the first light rays; a second reflecting surface reflecting the second light rays; a third reflecting surface reflecting the second light rays reflected by the second reflecting surface; a fourth reflecting surface reflecting at least part of the first light rays reflected by the first reflecting surface and the second light rays reflected by the third reflecting surface; and a light exiting surface having a convex lens surface having a rear-side focal point. The fourth reflecting surface extends rearward from the rear-side focal point. A predetermined light distribution pattern is formed by superposing first and second partial light distribution patterns upon each other as a synthetic light distribution pattern.

A lens member in front of a light source can include: an incident portion dividing the entering light rays into first light rays obliquely upward and forward and second light rays obliquely upward and rearward; a first reflecting surface reflecting the first light rays; a second reflecting surface reflecting the second light rays; a third reflecting surface reflecting the second light rays reflected by the second reflecting surface; a fourth reflecting surface reflecting at least part of the first light rays reflected by the first reflecting surface and the second light rays reflected by the third reflecting surface; and a light exiting surface having a convex lens surface having a rear-side focal point. The fourth reflecting surface extends rearward from the rear-side focal point. A predetermined light distribution pattern is formed by superposing first and second partial light distribution patterns upon each other as a synthetic light distribution pattern.

A light fixture assembly configured to direct light outwardly and downwardly, while precluding the directing of light upwardly. The light fixture assembly comprises a housing, an LED light and a reflector. The LED light includes a mounting surface and a light emitting member. The mounting surface is coupled to the housing, and in particular on an inside surface of the upper side wall, with the light being directed in at least a downward direction. The reflector includes a second portion which is positioned within the inner cavity and below the LED light. The second portion is angled at least at 45° relative to a horizontal axis in an operational configuration. The reflector directs light imparted by the light emitting member in at least one of a downward and an outward direction, while precluding the directing of light imparted by the light emitting member in an upward direction.