Abstract: Electronic device including a lighting device, capable of illuminating a room or the like; a photodetector; an ultra-wideband pulse transmitter; an ultra-wideband pulse receiver; a controller, connectable to the internet; where the controller is adapted for coding a signal and transmitting it to the lighting device and/or to the pulse transmitter, and for decoding a signal received by the photodetector or the pulse receiver; the lighting device is adapted to transmit the signal as a LiFi signal and the pulse transmitter is adapted to transmit the signal as a UWB signal.

Abstract: Electronic device comprising: a lighting device, capable of illuminating a room or the like; a photodetector; an ultra-wideband pulse transmitter; an ultra-wideband pulse receiver; a controller, connectable to the internet; wherein the controller is adapted for coding a signal and transmitting it to the lighting device and/or to the pulse transmitter, and for decoding a signal received by the photodetector or the pulse receiver; wherein the lighting device is adapted to transmit the signal as a LiFi signal and the pulse transmitter is adapted to transmit the signal as a UWB signal.

Abstract: The invention relates to a method for decoding (10) a modulated light signal (35) carrying a digital data set, the decoding method (10) comprising a step of searching (12, 13, 14, 15) for at least two frequencies of oscillation of a digital transcription of the light signal detected by a photodetector (23), each frequency of oscillation being representative of a logic value of the bits constituting the digital data carried by the light signal. Advantageously, a most significant bit is represented by a first frequency of oscillation and a least significant bit is represented by a second frequency of oscillation, the first frequency of oscillation being chosen so as to form, at the photodetector (23), a digital signal that is larger than that formed by the second frequency of oscillation by at least 4 elementary detection units of said photodetector (23). The invention also relates to an optoelectronic system (20) that implements a decoding method (10) of this kind.

Abstract: The invention relates to a light communication method (10) implemented by a light communication emitter system (61), in which a reference sequence (320) is shrewdly inserted periodically and repeatedly into a digital data frame to be transmitted by way of a modulated light beam (615). The presence of this reference sequence (320) allows a light communication receiver system (62) to automatically detect the reference sequence (320) in the detected modulated light beam (615). This detection makes it possible to automatically detect one of the two oscillating frequencies used to represent a logic state of the transmitted digital data, without having to calibrate the receiver system (62) on the basis of said oscillating frequencies.

Abstract: A network is disclosed of a plurality of outdoor lighting units. Each lighting unit comprises a light fixture, for example a LED lamp; a power generating means, such as a solar panel or a wind turbine; and a storage means for electric energy, for example a battery. The energy storage means of neighboring lighting units are connected by a conductor. An imbalance in power generation or power consumption results in a balancing current through the conductor. The balancing current equalizes the charge levels of the energy storage means in the system. In an embodiment the conductor comprises a single core wire and ground.

Abstract: A light fixture is disclosed having a plurality of light sources belonging to at least two types emitting light of different S/P ratio. The light sources are placed in the light fixture so that the light fixture, when in use, emits a light bundle having varying S/P ratios within the bundle. In an embodiment the light bundle has a central area with low S/P ratio, and peripheral areas having higher S/P ratio. The S/P ratio in the peripheral areas can be as high as 5 or even higher. In an alternate embodiment the light bundle has a central area with relatively S/P ratio, and peripheral areas having lower S/P ratio. The S/P ratio in the peripheral areas can be as low as 2 or even lower. The light fixtures are particularly suitable for outdoor lighting, for example street lighting.

Abstract: A network is disclosed of a plurality of outdoor lighting units. Each lighting unit comprises a light fixture, for example a LED lamp; a power generating means, such as a solar panel or a wind turbine; and a storage means for electric energy, for example a battery. The energy storage means of neighboring lighting units are connected by a conductor. An imbalance in power generation or power consumption results in a balancing current through the conductor. The balancing current equalizes the charge levels of the energy storage means in the system. In an embodiment the conductor comprises a single core wire and ground.

Abstract: A lighting arrangement is disclosed having a first light source with a dominant wavelength in the range of 505 nm to 520 nm; and a second light source having a dominant wavelength in the range of from 580 nm to 630 nm. The lighting arrangement has at least one control means for adjusting the output of the first light source independent from the light output of the second light source. The control means allows for providing an optimum spectral balance under varying luminance levels.

Abstract: A light fixture is disclosed having a plurality of light sources belonging to at least two types emitting light of different S/P ratio. The light sources are placed in the light fixture so that the light fixture, when in use, emits a light bundle having varying S/P ratios within the bundle. In an embodiment the light bundle has a central area with low S/P ratio, and peripheral areas having higher S/P ratio. The S/P ratio in the peripheral areas can be as high as 5 or even higher. In an alternate embodiment the light bundle has a central area with relatively S/P ratio, and peripheral areas having lower S/P ratio. The S/P ratio in the peripheral areas can be as low as 2 or even lower. The light fixtures are particularly suitable for outdoor lighting, for example street lighting.

Abstract: A lighting arrangement is disclosed having a first light source with a dominant wavelength in the range of 505 nm to 520 nm; and a second light source having a dominant wavelength in the range of from 580 nm to 630 nm. The lighting arrangement has at least one control means for adjusting the output of the first light source independent from the light output of the second light source. The control means allows for providing an optimum spectral balance under varying luminance levels.

Abstract: The invention relates to a lighting arrangement (1) for illuminating an area under mesopic conditions. The lighting arrangement has one or more LEDs (6) emitting substantially monochromatic light in a first wavelength region. The lighting arrangement further has one or more LEDs emitting (8) substantially-monochromatic light in a second wavelength region. Aforementioned combination of LEDs is such that, in use, the light provided by the lighting arrangement has an S/P-ratio greater than 2.

Abstract: A street lighting arrangement for providing light distribution over an angular range between an axis and a cut-off angle, the arrangement comprising a first array (1) of at least one LED (2) having a substantially planar distribution pattern, the first array being directed at an angle intermediate to the axis and the cut-off angle, a second array of at least one LED having a substantially planar distribution pattern, the second array being directed at an angle intermediate to the axis and the cut-off angle and generally opposite to the first array, a first reflector (14) directed to receive light from the first array (1) beyond the cut-off angle and reflect it as a substantially parallel beam in the direction of the second array at close to the cut-off angle and a second reflector directed to receive light from the second array beyond the cut-off angle and reflect it as a substantially parallel beam in the direction of the first array (1) and at close to the cut-off angle.

Abstract: The invention relates to a lighting system for illuminating algae in an aqueous liquid. The lighting system includes a light source comprising a plurality of LEDs, a mounting structure for supporting the LEDs and a housing for accommodating the light source and the mounting structure. At least a portion of the housing is transparent for light emitted by the light source. The housing is at least partly filled with a cooling liquid, such that, in use, heat from the LEDs is transferred by the cooling liquid from the LEDs by means of convection. The invention further relates to a reactor comprising such lighting system.

Abstract: Disclosed is a lighting assembly for growing plants. The lighting assembly has a first light source emitting light in a first wavelength range of 600 to 750 nm; a second light source emitting light in a second wavelength range of 375 to 500 nm; and a controller for controlling the output of the first light source independent from the output of the second light source. Disclosed are also an enclosure for growing plants, and a method for growing plants.

Abstract: The invention relates to a lighting device for stimulating plant growth. The lighting device has a solid state light source, suitable for emitting light of at least one wavelength within a predetermined wavelength range. Furthermore, the solid state light source is adapted for connection to an electrical network. The solid state light source is in contact with a cooling medium. In an embodiment, this cooling medium has a temperature in a temperature range between ?50 and 0° C.

Abstract: The invention relates to a lighting arrangement (1) for illuminating an area under mesopic conditions. The lighting arrangement has one or more LEDs (6) emitting substantially monochromatic light in a first wavelength region. The lighting arrangement further has one or more LEDs emitting (8) substantially-monochromatic light in a second wavelength region. Aforementioned combination of LEDs is such that, in use, the light provided by the lighting arrangement has an S/P-ratio greater than 2.

Abstract: A street lighting arrangement for providing light distribution over an angular range between an axis and a cut-off angle, the arrangement comprising a first array (1) of at least one LED (2) having a substantially planar distribution pattern, the first array being directed at an angle intermediate to the axis and the cut-off angle, a second array of at least one LED having a substantially planar distribution pattern, the second array being directed at an angle intermediate to the axis and the cut-off angle and generally opposite to the first array, a first reflector (14) directed to receive light from the first array (1) beyond the cut-off angle and reflect it as a substantially parallel beam in the direction of the second array at close to the cut-off angle and a second reflector directed to receive light from the second array beyond the cut-off angle and reflect it as a substantially parallel beam in the direction of the first array (1) and at close to the cut-off angle.

Abstract: Disclosed is a lighting assembly comprising one or more light emitting diodes (LEDs). The assembly comprises a ceramic disc which is coated with a layer of heat conducting material. The assembly provides sufficient galvanic insulation for it to be used safely even when connected to the electric grid as a power source.

Abstract: The invention relates to a heat sink (1) for cooling a light element. The heat sink (1) has a thermally conducting inner part (2) suitable for accommodating the light element. The heat sink (1) additionally has a thermally conducting outer part (3) which encloses the inner part in at least one plane. The at least one light element is galvanically shielded from the thermally conducting inner part. The inner part (2) and the outer part (3) can be joined to one another via at least one thermally conducting bridging link (4) in such a way that there is at least one opening (5) between the inner part (2) and the outer part (3).

Abstract: The invention relates to a lighting device for stimulating plant growth. The lighting device has a solid state light source, suitable for emitting light of at least one wavelength within a predetermined wavelength range. Furthermore, the solid state light source is adapted for connection to an electrical network. The solid state light source is in contact with a cooling medium. In an embodiment, this cooling medium has a temperature in a temperature range between ?50 and 0° C.