A lighting system includes a lighting device arranged to attach to a vehicle. The lighting device includes at least two ultraviolet lights and at least one sensor. The sensor determines whether any of at least two areas or zones adjacent to the lighting device are poorly visibly illuminated and/or occupied by personnel, and illuminates these areas or zones with ultraviolet light. The lighting system is configured to operate in conjunction with existing emergency visible lighting and/or flashing visible light systems by using the sensors to sense visible illumination of each individual area or zone provided by the existing emergency visible lighting and flashing visible light systems. The lighting system may be configured to synchronize the illumination of each individual area or zone in ultraviolet light with intermittent absence of visible light illumination in each area or zone from the existing emergency visible lighting and flashing visible light systems.

The invention relates to a luminaire comprising a housing, at least two radiation sources and at least one directing means. The directing means is used to direct the emission of electromagnetic radiation emitted by the radiation sources. According to the invention, the radiation sources are all located in the center of the directing means such that the radiation sources are arranged concentrically with respect to one another. The radiation sources can be switched on and off individually, jointly, or in combination. Each radiation source emits electromagnetic radiation within a constant wavelength range when switched on, wherein different radiation sources can emit electromagnetic radiation within different wavelength ranges.

A fixture system includes a housing configured to be mounted in an upper region of a room or area. A light source is supported by the housing for providing visible light to illuminate at least a portion of the room or area. An ultraviolet radiation (UVR) system is supported by the housing for emitting UVC radiation in an upper region of the room or area. The UVR system includes at least one UVC emitting source and an optic member configured to direct UVC radiation in a pattern having a vertical width dimension that is above a threshold height from a floor or ground in the room or area.

A lighting system includes a lighting device configured to connect to an object. The lighting device includes a body and a control device. One or more ultraviolet light sources are attached to the body and connected to the control device. The ultraviolet light source(s) emit ultraviolet light in a wavelength range from 10 nm to 445 nm. The control device controls the frequency and duration of strobing of the ultraviolet light source(s). The control device cooperates with nearby emergency visible lighting and/or flashing visible light systems to designate and protect gaps in time from visible light illumination from the nearby emergency visible lighting and/or flashing visible light systems. The control device synchronizes the strobing of the ultraviolet light source(s) with the absence of visible light illumination from the nearby emergency visible lighting and/or flashing visible light systems during the designated gaps in time.

There is provided a luminaire (100) comprising: a first type light source (110) configured to emit visible light (111), the first type light source having a visible light main intensity peak (112) having a maximum intensity (114) in a first direction (116) from the luminaire; a second type light source (120) configured to emit ultraviolet, UV, light (121), the second type light source having a UV light main intensity peak (122) having a maximum intensity (124) in a, transverse, second direction (126). There is also provided a lighting system comprising a plurality of luminaires (100).

The present disclosure relates to a plant factory lighting system that includes at least: LED groups; a first switch that receives a first operation signal; a second switch unit that has a lever and a toggle switch formed such that that the lever is set one of a plurality of setting positions or a neutral position by operation of a worker and a signal generator generating a second operation signal such that the LED groups are operated in different operation patterns in accordance with the position of the lever; and a control module that controls operation of the LED groups to correspond to the first operation signal when the lever of the toggle switch is set at the neutral position, and controls operation of the LED groups to correspond to the second operation signal when the lever of the toggle switch is set at the setting positions.

Systems and techniques disclosed herein include a light therapy mat having a flexible clear portion, a flexible back portion, a flexible middle portion between the clear portion and the back portion, and a plurality of dual light emitting diodes (LEDs) positioned in the middle portion and configured to emit light at a first wavelength and a second wavelength. The first wavelength may be a red light wavelength or a near infrared light wavelength and the second wavelength may be the other one of the red light wavelength or the near infrared light wavelength.

The present invention relates to a lighting apparatus using a PCB substrate in which a sterilization LED for emitting a light within a visible light region and an LED having an infrared wavelength are combined, in which a colored light is emitted while minimizing a wavelength of a blue light, so that the lighting apparatus is harmless to a human body, and has a sterilization effect. To this end, the present invention includes a PCB substrate on which a UV LED package including a first UV LED package including at least one first LED chip for emitting a light having a center wavelength of 405 nm and a fluorescent substance layer formed on the first LED chip, and configured to emit a colored light, and a second UV LED package, and an infrared LED package are disposed. When the lighting apparatus according to the present invention is used, while the colored light illuminates an inside of a room, a damage caused by a blue light is reduced, and a COVID-19 virus is effectively killed due to a sterilization effect. When lighting installed in public transportation and publicly used facilities is replaced with the lighting apparatus according to the present invention, the sterilization effect is naturally achieved while the lighting is provided, so that the spread of a COVID-19 virus is reduced.

A lighting arrangement (100), comprising a first solid state light source (110) arranged to emit visible light, a second solid state light source (130) arranged to emit second light of at least one of violet light and ultraviolet (UV) light, a reflector (140) comprising at least one light-reflecting surface (145), wherein the reflector at least partially encloses the first and second solid state light sources, and wherein at least part of the reflector defines a mixing chamber (150) for mixing the visible light and the second light, a light exit window (160), wherein the visible light and the second light mixed by the mixing chamber are arranged to exit the lighting arrangement through the light exit window, and a third solid state light source (170) arranged to emit UV light, wherein the third solid state light source is arranged outside the mixing chamber.

A lighting system includes a projection surface and a lighting device that projects a projection pattern on the projection surface and includes a light source emitting coherent light and a diffractive optical element diffracting the coherent light to form the projection pattern and including fundamental pieces of diffractive optical element two-dimensionally arranged in a direction parallel to the projection surface. A fundamental period of spatial resolution r (on the projection surface and determined from a specified spatial resolution of the projection pattern at an intersection position of a perpendicular line drawn from a center of certain one of the fundamental pieces of diffractive optical element with respect to the projection surface), an angle ? (a half of an angle projecting the fundamental piece of diffractive optical element at the position), and a wavelength ? of light in the projection pattern projected at the position) satisfy

sin?>?/(6r).