Abstract: A lighting device includes an envelope; a light generating unit with at least one solid state light source; a stem configured to support the light generating unit inside the envelope and including an indent; a mechanical fastening part configured to fasten the light generating unit to the stem and including a hook element to mate with the indent and at least one finger to abut the stem; and a locking mechanism configured to lock the mechanical fastening part to the stem by preventing deflection of the hook element and at least one finger.

Abstract: A light emitting device (1) is provided comprising a light source (2) adapted for, in operation, emitting light (13) with a first spectral distribution, a first luminescent light guide (4) comprising a first light input surface (41) and a first light exit surface (42) extending at an angle different from zero to one another, and being adapted for receiving the light (13) with the first spectral distribution at the first light input surface (41), converting the light (13) with the first spectral distribution to light (14) with a second spectral distribution, guiding the light (14) with the second spectral distribution to the first light exit surface (42) and coupling the light (14) with the second spectral distribution out of the first light exit surface (42), and a first transparent heat sink element (3) arranged adjacent to at least one surface of the first luminescent light guide (4) and in the optical path between the light source (2) and the first luminescent light guide (4), the at least one surface bein

Abstract: A lighting device comprising a carrier board and an array of lighting elements mounted on the carrier board. The carrier board has a generally spiral shape and the carrier board can be tessellated with one or more identical other carrier boards with windings interleaved with each other. This enables multiple carrier boards to be formed from a single substrate with little or no waste of material. Different designs enable two, four or even more different identical carried board shapes to be tessellated together.

Abstract: The invention describes a dynamic control circuit (1) realized for connection in series with an LED arrangement (2), characterized by a first switching element (Q1) realized to provide a path for the LED current (ILED), and a monitoring arrangement (M) realized to control the first switching element (Q1) according to the level of the LED current (ILED) SO that the dynamic control circuit (1) presents a series impedance (Zdyn), which series impedance (Zdyn) gradually increases in response to a decreasing LED current (ILED) through the LED arrangement (2). The invention also describes a dimmable lighting arrangement (10) comprising an LED arrangement (2); a driver (3) realized to provide an input voltage (Vin) and an input current (ILED) to the LED arrangement (2); and such a dynamic control circuit (1) connected in series with the LED arrangement (2). The invention further describes retrofit LED light-bulb (100); and a method of driving an LED arrangement.

Abstract: In various embodiments, a lighting control apparatus (100) may include logic such as a controller (102, 202, 302, 502) and a thermal imaging sensor (108, 208, 308, 408a-b, 508) operably coupled with the controller. The thermal imaging sensor may have at least one field of view (110, 210, 310, 410a-b, 510) pointed at a surface (112, 212, 312, 412a-b, 512, 612). The surface may exhibit various degrees of thermal conductivity. The controller may be configured to: receive a signal from the thermal imaging sensor, the signal being indicative of heat (114) captured by the surface and sensed by the thermal imaging sensor. Based on the signal received from the thermal imaging sensor, the controller may cause one or more light sources (104, 204, 304, 504) to emit light having one or more selected properties.

Abstract: A DC-powered device (200) configured to receive DC power from an external power sourcing equipment (202) and to exchange operational data with the power sourcing equipment, the DC-powered device comprising an interface unit (206) comprising at least one connection unit (208) configured to receive the DC power from the power sourcing equipment and to exchange operational data with the power sourcing equipment, a data processing unit (214) connected to the interface unit and configured to compare the exchanged operational data with prestored allowed operational template data and to generate and store, in a storage unit (216), log data pertaining to unallowed operational data, the unallowed operational data being any exchanged operational data that does not correspond to the prestored allowed operational template data, and an operational unit (218), configured to execute operational instructions pertaining to that exchanged operational data corresponding to the prestored allowed operational template data.

Abstract: A lighting device or a lamp bulb (100, 200) with a smooth appearance comprises at least one light source (101); a heat sink component (104, 204), having a bottom (1043) and a side wall (1044) extending from the bottom (1044), wherein the bottom (1043) comprises a protrusion (1041) and wherein the at least one light source (101) thermally contacts the protrusion (1041) of the heat sink component (104, 204); and a cover provided on the sidewall (1044) opposite to the bottom(1043), thereby defining an air chamber (1051, 2051) between the cover, the side wall (1044), the bottom (1043) and the protrusion (1041).

Abstract: The invention provides a luminaire for illuminating a road, comprising a light source (10), a reflector arrangement (12) defining a light entrance window (18) at the top to which light is supplied by the light source (10) and a larger light exit window (20) at the bottom, and an optical plate (22) over the light exit window (20). The optical plate (22) comprises an array of elongate prisms which each extend in a side-to-side direction corresponding to the width direction of the road. The reflector (12) is primarily responsible for control of the light output in the road width direction and the optical plate (22) is primarily responsible for control of the light output in the road length direction.

Abstract: Disclosed is a lighting fixture (200) with a separately controllable set of LED-based light sources (102) configurable to create both downlighting and wall-washing lighting effects. To create the desired wall-washing effects, the intensity and angle of light sources in the lighting fixture are adjusted to individually illuminate different portions of the wall of surface. One set of LED-based light sources positioned along the edge of the ceiling tile is configured to emit a low intensity light beam toward the upper portion of the wall surface adjacent the ceiling. Another set of LED-based light sources emits a higher intensity light beam toward an intermediate portion of the wall surface. Another set of LED-based light sources emits an even higher intensity light beam toward the bottom portion of the wall surface.

Abstract: Presented are concepts for controlling cove lighting. Once such concept provides cove lighting adapted to output decorative light for illuminating the ceiling of an architectural space. The cove lighting comprises a control unit adapted to individually control each of the primary light sources in response to a lighting control signal so that the output decorative light mimics an outdoor lighting condition.

Abstract: Power conversion device for supplying a load with a PWM signal, comprising an inductive filter having at least an output configured to be connected to the load, the device comprising: a power conversion module supplied by an input voltage and configured for providing a plurality of output signals wherein one of the plurality of output signals is supplied to the filter; a conversion ratio control stage coupled to the power conversion module; and a controller configured to: determine a requested conversion ratio based on the input voltage and a target reference voltage; and based on the requested conversion ratio, control the conversion ratio control stage to operate in either a first operating mode, whereby the power conversion module provides the output signals in accordance with a first conversion ratio, or a second operating mode, whereby the power conversion module provides the output signals in accordance with a second conversion ratio.

Abstract: The present invention relates to a lighting device (100) capable of creating dynamic color shadows. The lighting device (100) comprises multiple light sources (104, 105, 106) of different colors arranged to, together as a unit, emit white light. Furthermore, a contrast producing element (110) receives the emitted light and comprises portions (114) which may block light such that a shadow can be created on an object (122) behind the contrast producing element. A control unit (116) controls the light sources to modulate a spatial light spectral distribution if a selector is in an active state, or if the control unit is in an inactive state, white light is emitted by the lighting device. Thus, the lighting device is switchable between creating dynamic color shadows on objects while emitting white light, and only emitting white lights.

Abstract: A system (100) for and a method of monitoring water drainage is provided. The system for monitoring water drainage comprising a sensor interface (118), a storage (120), an atmospheric precipitation unit (130) and a signal generator (140). The sensor detects whether water is present at an associated surface (112) and generates a sensor signal (111). The storage stores water drainage information that relates to the associated surface and comprises characteristics of water presence on the associated surface in cases of atmospheric precipitation. The atmospheric precipitation unit receives recent atmospheric precipitation information.

Abstract: In order to increase transmission reliability and transmission efficiency in the presence of interference at a transmitting or receiving node of a wireless network a device for controlling the node of the wireless network is provided, wherein the node is associated to at least one load unit. The device comprises a control unit that is adapted to adjust a communication mode of the node based on an operation state of the load unit.

Abstract: The invention relates to a power distribution system, such as a Power over Ethernet power distribution system. A powered device provides a pulse, such as a Maintain Power Signature, when in standby such that a power providing device remains providing power to it. To increase energy efficiency, the MPS can be cycled (60 ms pulse every 300 ms to 400 ms) according to the IEEE802.3af/at standards. By introducing a controllable switch, for electrically decoupling at least part of the powered device from the power providing device, and a pulse generator, the MPS can be generated in a more energy efficient way and/or can be shortened (e.g. to 5 ms). As an example, the controllable switch can decouple the bulk capacitor of the powered device during MPS generation to prevent the bulk capacitor from filtering out the MPS.

Abstract: A luminaire (100) for controlling a light output of a lighting module (106) comprising at least one light source is disclosed. The luminaire (100) comprises a housing (102) and a plurality of connectors (104, 105) for interfacing with the lighting module (106). Each connector (104, 105) has a position defined by a location relative to the housing (102) and an orientation relative to the gravitational field, wherein at least two connectors (104, 105) have different orientations. The luminaire (100) further comprises a processor (108) for detecting the lighting module (106) at a connector (104) and for accessing information indicative of the position of the connector (104). The processor (108) is further arranged for identifying the lighting module (106) based on a signal received from the lighting module (106), and for controlling the light output of the lighting module (106) based on the identification of the lighting module (106) and the position of the connector (104).

Abstract: An AC/DC PFC converter comprises an LLC PFC pre-regulator and a DC/DC converter output stage. The output stage has a feedback unit adapted to provide a feedback signal (in addition to the conventional feedback of the bus voltage error) to the control circuit of the PFC pre-regulator for modulating the controlled output voltage of the PFC pre-regulator in dependence on the output power and/or the input current and voltage. In this way, the total harmonic distortion of the input of the converter can be reduced by controlling the gate switching in the PFC pre-regulator.

Abstract: A cooling arrangement (1) for cooling of an apparatus (10) which in use may generate heat is disclosed. The cooling arrangement (1) comprises a first member (2), which comprises a first base (4) and a first spiral wrap (5) extending from the first base (4), and a second member (3), which comprises a second base (6) and a second spiral wrap (7) extending from the second base (6). The first spiral wrap (5) and the second spiral wrap (7) are interleaved. The first member (2) is configured to at least thermally couple the apparatus (10) thereto. At least one of the first member (2) and the second member (3) can be moved so as to result in an orbiting motion of one of the first spiral wrap (5) and the second spiral wrap (7) relatively to the other one of the first spiral wrap (5) and the second spiral wrap (7) such that a volume of fluid in at least one space between the first spiral wrap (5) and the second spiral wrap (7) progressively moves during the orbiting motion.

Abstract: According to the invention a lamp (100, 200) is provided. The lamp (100, 200) comprising: a wick structure (102, 202) hosting a solid state light source (104, 204) and comprising a fixed wick material (108, 208), an envelope (106, 206) forming a cavity (109, 209) hosting the wick structure (102, 202), wherein the cavity (109, 209) is configured as a heat pipe comprising a working fluid (110, 210), wherein the envelope (106, 206) is shaped such that condensed working fluid (110, 210) is guided towards the fixed wick material (108, 208) independently of the spatial orientation of the lamp (100, 200).

Abstract: A lighting device (1) comprising a plurality of light sources (2) each light source of the plurality of light sources being arranged to, in operation, emit light, and first secondary optics (3) and second secondary optics, the first secondary optics being arranged such that the light emitted by the light sources is injected directly into the first secondary optics, the first secondary optics causing light to be emitted in a direction towards the second secondary optics, the secondary optics being a reflective light collimating element (4) having a circumferential surface (43) arranged such as to extend around the plurality of light sources and the first secondary optics, the first secondary optics and the second secondary optics causing the light being emitted by each light source of the plurality of light sources to be mutually substantially overlapping before extraction from the lighting device and the first secondary optics (3) comprising one or more reflecting surface segments (5) for reflecting light bac