A luminaire includes a housing, a luminous zone coupled with the housing, and one or more transition zones coupled with the housing and disposed adjacent to the luminous zone. The luminous zone provides a first light to an illuminated area, and the one or more transition zones provide a second light to the illuminated area. The first light is harsher than the second light. A method of illuminating an area includes providing a first light to the area from a luminous zone of a luminaire and providing a second light to the area from one or more transition zones disposed adjacent to the luminous zone within the luminaire. The first light is a harsher light than the second light.

A lighting fixture appears as a skylight and is referred to as a skylight fixture. First and second light engines of the fixture provide different color points, peak light intensity angles, far-field light distribution characteristics, and/or circadian stimulus values. A skylight fixture may include a sky-resembling assembly and a plurality of sun-resembling assemblies, with dedicated optical assemblies and/or light sources. A lighting fixture may include multiple waveguides that different extraction feature patterns and/or may be sequentially arranged.

A light fixture, e.g., as an artificial skylight, in which light within a region defined by x, y color coordinates (0.37, 0.34), (0.35, 0.38), (0.15, 0.20), and (0.20, 0.14) exits a first light engine, and light within a region defined by coordinates (0.29, 0.32), (0.32, 0.29), (0.41, 0.36), (0.48, 0.39), (0.48, 0.43), (0.40, 0.41), and (0.35, 0.38) exits a second light engine. Also, light fixtures in which a second light engine comprises a sidewall, and light exiting a first light engine passes through space defined by the sidewall; light fixtures in which first and second light engines are able to output light providing different CS values at a luminance; light fixtures wherein light incident on a surface of the fixture and cumulative light exiting the fixture have different color points; light fixtures wherein light distribution characteristics of light engines differ; and/or other features. The invention also relates to corresponding methods.

A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.

In various embodiments, a transom light arrangement may include a transom, which is arranged between a construction element and a transom light, a light source arrangement, which is mounted at least one of on or in the transom, with the light source arrangement or the transom defining a horizontal plane, and a screen structure. The light source arrangement and the screen structure are arranged relative to one another and are configured such that a spatial region above the horizontal plane is illuminated using the light source arrangement.

In one aspect, a system for collecting light directed through an architectural opening includes a plurality of optical fibers positioned within the architectural opening. A portion of light from a light source is absorbed by the plurality of optical fibers. One or more optical fibers of the plurality of optical fibers are configured to transmit the absorbed light to one or more light collection elements.

The invention relates to a lighting device for at least one plant, comprising an artificial lighting unit for providing artificial light for lighting the plant; a sunlight unit for providing sunlight for lighting the plant; a mixing unit for generating a mixed light consisting of the artificial light and the sunlight; a distributing unit for distributing the mixed light and lighting the plant with the distributed mixed light; and an adjustment unit for adjusting a property of the mixed light. The invention provides a lighting device for at least one plant, i.e., one or more plants, wherein the device can be used in an energy-saving manner for indoor farming.

A method and system for collecting and distributing generated and/or solar radiation. The distribution is a pulsed distribution. A pulsed distribution subsystem combining a generated radiation source with a solar radiation collector is provided. Radiation from the pulsed distribution subsystem is provided to one or more discrete distribution systems; the discrete distributions systems transmit and distribute radiation, such as visible light, to one or more end use points in a facility.

A natural light guiding system used for plant cultivation includes a chasing light and collecting light device and at least one lighting device connected to the chasing light and collecting light device. The at least one lighting device includes a lampshade is hollow and cone-shaped. A top plate is mounted to a top of the lampshade. At least one optical fiber is connected to the chasing light and collecting light device. At least one collecting lens barrel is disposed on the top of the lampshade and projects light into the lampshade. A free ends of the at least one optical fiber is connected to the at least one collecting lens barrel. At least one LED light source is mounted onto an inner periphery of the lampshade and provides an auxiliary lighting effect when a natural light source is not enough.

A lighting control system for optimizing operation of skylights of distributed sites to facilitate daylight harvesting comprises a processor and a memory communicatively coupled to the processor. The memory stores processor instructions, which causes the processor to identify skylight-linked lighting circuits from a plurality of lighting circuits by analyzing site configuration data, site instrumentation data, and ambient data, and determine interception points configured for each identified skylight-linked lighting circuit to switch from daylight utilization to electric consumption and to switch from electric consumption to daylight utilization. The processor is further caused to derive an optimum logic for the operation of skylight linked lighting circuits based on the interception points and current operating schedule of the skylight linked lighting circuits and optimize the operation of the skylights based on the optimum logic.