A light emitting device includes multiple light source parts each including at least one first light source part and at least one second light source part, each including a light emitting element and a light-guiding member to guide light of the light emitting element. Each light-guiding member has a taper shape narrowing toward the light emitting element. Light from each light source part satisfies condition of θ≤α≤tan.sup.−1×2 tan θ. (θ is an angle of a straight line connecting a position on the light-irradiation surface having an illuminance of at least one-half of that at center position and the center of the light emitting surface of the first light source part, and α is an angle of a straight line connecting a center of a light-irradiation region on a light-irradiation surface and a center of the light emitting surface of the second light source part.)

A bare optical fiber manufacturing method includes applying an ultraviolet curable resin applied around an optical fiber; and irradiating the ultraviolet curable resin with ultraviolet light emitted from semiconductor ultraviolet light emitting elements, by use of an ultraviolet irradiation device having plural ultraviolet irradiation units each having plural positions where the ultraviolet light is emitted toward the ultraviolet curable resin, the plural positions being arranged on the same circle, the plural ultraviolet irradiation units being arranged in a traveling direction of the optical fiber such that the optical fiber passes centers of the circles, at least two of the plural ultraviolet irradiation units being differently arranged with respect to circumferential direction angles thereof around an axis that is the traveling direction of the optical fiber.

A bare optical fiber manufacturing method includes applying an ultraviolet curable resin applied around an optical fiber; and irradiating the ultraviolet curable resin with ultraviolet light emitted from semiconductor ultraviolet light emitting elements, by use of an ultraviolet irradiation device having plural ultraviolet irradiation units each having plural positions where the ultraviolet light is emitted toward the ultraviolet curable resin, the plural positions being arranged on the same circle, the plural ultraviolet irradiation units being arranged in a traveling direction of the optical fiber such that the optical fiber passes centers of the circles, at least two of the plural ultraviolet irradiation units being differently arranged with respect to circumferential direction angles thereof around an axis that is the traveling direction of the optical fiber.

A light fixture assembly for mounting on a mounting surface of a building material includes: a light fixture. The light fixture comprises a main body comprising a back side surface and a light transmissive side surface opposing the back side surface. The main body has a first dimension from a first lateral edge to a second lateral edge opposing the first lateral edge that is greater than a second dimension from the back side surface to the light transmissive side surface. The assembly further includes a mounting adapter provided at the back side surface, and a plate spring provided at the back side surface and extending along a first direction from the first lateral edge to the second lateral edge. The plate spring is configured to apply a restoring force to the first lateral edge and the second lateral edge.

A luminaire includes a housing having a pair of sides and a base extending between the sides. A lens is removably coupled to the housing and includes side portions. A mounting bracket is directly coupled to the base and includes a chamber, and a driver is coupled to the base and positioned within the chamber. A plurality of light emitters is coupled to a surface of the mounting bracket and in communication with the driver. A first portion includes a pocket and a protuberance positioned on one of a side portion of the lens and a side of the housing. A second portion includes a projection and a curved portion positioned on the other of the side portion of the lens and the side of the housing. The protuberance is engageable with the pocket to couple the lens to the housing.

A bare optical fiber manufacturing method includes applying an ultraviolet curable resin applied around an optical fiber; and irradiating the ultraviolet curable resin with ultraviolet light emitted from semiconductor ultraviolet light emitting elements, by use of an ultraviolet irradiation device having plural ultraviolet irradiation units each having plural positions where the ultraviolet light is emitted toward the ultraviolet curable resin, the plural positions being arranged on the same circle, the plural ultraviolet irradiation units being arranged in a traveling direction of the optical fiber such that the optical fiber passes centers of the circles, at least two of the plural ultraviolet irradiation units being differently arranged with respect to circumferential direction angles thereof around an axis that is the traveling direction of the optical fiber.

A light fixture assembly for mounting on a mounting surface of a building material includes: a light fixture. The light fixture comprises a main body comprising a back side surface and a light transmissive side surface opposing the back side surface. The main body has a first dimension from a first lateral edge to a second lateral edge opposing the first lateral edge that is greater than a second dimension from the back side surface to the light transmissive side surface. The assembly further includes a mounting adapter provided at the back side surface, and a plate spring provided at the back side surface and extending along a first direction from the first lateral edge to the second lateral edge. The plate spring is configured to apply a restoring force to the first lateral edge and the second lateral edge.

A lighting apparatus includes a light source, a driver, a light housing, an actuator unit, a light passing cover, and an external switch. The driver is used for converting an external power to a driving current supplied to the light source. The light housing is used for disposing the light source and the driver. The actuator unit is connected the driver for configuring a working status of the driver. The light passing cover is fixed to the light housing for a light of the light source to pass through. The external switch is mechanically connected to the actuator via a through hole of the light passing cover for the actuator to generate a control message to the driver. The driver controls the light source according to the control message to configure the working status of the light source.

A luminaire includes a bracket having a first side and a second side, a light source connected to the first side of the bracket, and a driver connected to the second side of the bracket. A luminaire housing may contain the light source and be mounted to the first side of the bracket, wherein the first side of the bracket is capable of blocking heat generated within the luminaire housing from reaching the driver. The luminaire housing may include a heatsink to direct heat generated within the luminaire housing away from the luminaire housing, and the bracket is located between the heatsink and the driver. The driver may include a driver casing having an inner surface removably fastened to the second side of the bracket.

Disclosed is a lighting device (1) for generating a dynamically adjustable spotlight without moving parts. The lighting device comprises a planar array of individually addressable sets of light sources (11), each set comprising at least one light source, each of said light sources being arranged to produce a luminous distribution; a controller (20) arranged to individually address said sets of light sources; and an optical system (100) comprising a plurality of refractive lenses (110, 120, 130) common to the individually addressable light sources and arranged to shape the luminous distribution of each set of light sources into a spotlight (13) and project said spotlight in an angular direction that is a function of a position of said set in the array.