A method and a device are provided to improve growth and production of various crop plants. The plants are exposed to a combination of photosynthetically active light and near infrared light.

A lighting apparatus according to an embodiment comprises: a circuit board; and a plurality of light emitting modules having first to third light source units for emitting different colors on the circuit board; a control unit for providing a current control signal for controlling a current of each of the first to third light source units; a driver for controlling currents of the first to third light source units with a current control signal of the control unit, and a memory unit for storing luminous flux deviation data of the first to third light source units of each of the plurality of light emitting modules, wherein the first light source unit includes a plurality of first light emitting devices for emitting red light, and the second light source unit includes a plurality of second light emitting devices for emitting green light, and the third light source unit includes a plurality of third light emitting devices for emitting blue light, and the control unit controls currents of the first, second, and third light source units of the plurality of light emitting modules, respectively, according to an intensity value of an input current corresponding to the luminous flux deviation data.

An exterior aircraft light unit includes a housing; a mounting structure, mounted to the housing and extending away from the housing substantially along a first cross-sectional plane; a lens cover, mounted to the housing, surrounding the mounting structure, and defining an inner space of the exterior aircraft light unit, with the mounting structure dividing the inner space of the exterior aircraft light unit into a first partial inner space and a second partial inner space; a plurality of anti-collision light sources, configured to emit respective sequences of warning light flashes in operation.

A light source apparatus that is provided includes: a light source; a switch for switching the light path of irradiation light emitted by the light source between a first light path and a second light path; and an optical filter that is fixedly arranged in the first light path and filters irradiation light propagating along the first light path into light in a specific wavelength region.

Provided is a lighting device with an inactivation function, the lighting device allowing the addition of an inactivation function while being equal to conventional lighting devices in device size. The lighting device with the inactivation function includes: a UVC light source to emit ultraviolet light having a peak wavelength in a wavelength range from 200 nm to 230 nm; an LED light source to emit visible light; a single unit of an AC/DC converter to convert an AC voltage derived from an external power source into a DC voltage and output the DC voltage; a UVC light source-specific circuit part to convert the DC voltage output from the AC/DC converter into a voltage for lighting the UVC light source; and an LED light source-specific circuit part to convert the DC voltage output from the AC/DC converter into a current for lighting the LED light source.

A ceiling fan includes a rotatable hub adapted to be suspended from the ceiling. The hub includes at least one fan blade adapted for rotating with the hub. An uplight module is provided having a plurality of different lights, each of the plurality of lights for producing a different type of light incident on the ceiling. The uplight module may include a modular circuit board assembly comprising a main board including one or more LEDs and one or more auxiliary boards connected to the main board and including one or more UV LEDs, whereby adaptation for producing germicidal energy can be achieved without dismounting the ceiling fan from the ceiling. A controller may be provided for controlling the light intensity or temperature, including from pre-selected values. Related methods are also disclosed.

An interior aircraft lighting assembly comprises: at least one infrared lighting device for emitting infrared light; at least one further lighting device for emitting visible light; a lighting assembly controller for controlling an operation of the at least one infrared lighting device and of the at least one further lighting device; a supplementary infrared lighting device controller; and a power supply network, which is configured for supplying electric power from the lighting assembly controller to the at least one further lighting device. The supplementary infrared lighting device controller is tapped into the power supply network. The lighting assembly controller is configured to provide an electric trigger pulse on the power supply network for activating the at least one infrared lighting device.

A light emitting diode, LED, filament (110), configured to emit LED filament light, comprising an array of a plurality of light emitting diodes (120), LEDs, configured to emit LED light, a carrier (130) arranged to support the plurality of LEDs, at least one heat sink (140) arranged in thermal connection with the carrier for a dissipation of heat from the plurality of LEDs during operation, wherein the at least one heat sink comprises a base portion (150) extending parallel to the carrier, and a plurality of fins (160) projecting from the base portion, and an encapsulant (170) comprising a translucent material, wherein the encapsulant at least partially encloses the plurality of LEDs, the carrier and the at least one heat sink.

A light emitting device includes a light emitting diode chip configured to emit first light having a peak wavelength of 400 nm to 470 nm; a wavelength conversion material converting a portion of the first light into second light having a peak wavelength of 620 nm to 670 nm; and a near-infrared phosphor configured to convert a portion of the first light into third light having a peak wavelength of 740 nm to 820 nm, wherein the near-infrared phosphor includes a phosphor represented by composition formula CaAl.sub.(12-x-y)Ga.sub.yO.sub.19:xCr.sup.3+, where x satisfies 0.1x0.3 and y satisfies 1 or more, and an emission spectrum of the third light alone has a ratio of an intensity of 690 nm relative to an intensity of 780 nm of 0.3 or less.

A display device includes a light-transmitting portion, a display light source arranged at an inner side of the light-transmitting portion, and a housing including an opening. The housing accommodates the display light source and the light-transmitting portion is arranged in the opening. The light-transmitting portion includes a transparent plastic base member, a first color exhibiting layer containing dye or pigment, and a second color exhibiting layer containing a filler made of a cold mirror thin film. The first color exhibiting layer has a transmittance of 20% or more for light having a specific wavelength. The second color exhibiting layer has a reflectance of 80% or less for light having a wavelength not absorbed by the dye or the pigment of the first color exhibiting layer and a transmittance of 60% or more for light having a wavelength absorbed by the dye or the pigment of the first color exhibiting layer.