Abstract: Light Emitting Diodes (LEDs) are increasingly used in illumination applications. To control multiple Light Emitting Diodes (LEDs), or any other controllable light source, this document introduces a single-wire multiple-LED power and control system. Specifically, individually controlled LED units are arranged in a series configuration that is driven by a control unit located at the head of the series. Each of the individually controlled LED units may comprise more than one LED that is also individually controllable. The head-end control unit provides both electrical power and control signals down a single wire to drive all of the LED units in the series in a manner that allows each LED unit to be controlled individually or in assigned groups.

Abstract: An LED lighting system may include one or more light-emitting diodes and one or more power management modules. Components of the LED lighting system may be selected and arranged, for example, to match a load voltage to an operating voltage. Matching the load voltage to the operating voltage may enable efficient use of power by the LED lighting system. A method of selecting components of the LED lighting system is provided. For example, the components may be selected based on a target luminance and a given operating voltage. The method may be facilitated and/or implemented with a computer.

Abstract: In one aspect, an LED lighting apparatus includes an electronic circuit board having a peripheral portion and a central portion that is radially inward of said peripheral portion, said electronic circuit board having an exterior side for optically interfacing with ambient environment during operation and an interior side opposite the exterior side. At least one LED is mounted on the exterior side of the electronic circuit board central portion and a thermally conductive housing encloses said electronic circuit board, said thermally conductive housing formed of a moldable thermally conductive material. The thermally conductive housing defines a first cavity adjacent the central portion of the electronic circuit board exterior side and a second cavity adjacent the central portion of the electronic circuit board interior side, wherein a portion of said thermally conductive housing being overmolded onto said peripheral portion. In a further aspect, a method of manufacturing an LED lighting apparatus is provided.

Abstract: A LED lamp device includes a power unit serially linking a plurality of LED lamp sets by a power cord. The power unit has a regulating circuit, power switch, and an indicator. Each LED lamp set includes a metal heat sink which can be fixed to a specific position by bolts, clamping, gluing, or other method. The metal heat sink has at least one and five most LEDs. The LEDs can be arranged to a metal circuit board, print circuit board, or directly mounted on surface of the metal heat sink. A lens having a receiving space is arranged above the plurality of LEDs.

Abstract: A lamp comprising a solid state light emitter, the lamp being an A lamp and providing a wall plug efficiency of at least 90 lumens per watt. Also, a lamp comprising a solid state light emitter and a power supply, the emitter being mounted on a heat dissipation element, the dissipation element being spaced from the power supply. Also, a lamp, comprising a solid state light emitter and a heat dissipation element that has a heat dissipation chamber, whereby an ambient medium can enter the chamber, pass through the chamber, and exit. Also, a lamp, comprising a light emissive housing at least one solid state lighting emitter and a first heat dissipation element.

Abstract: An LED lamp includes an optical part, a heat dissipation part and an electric part. The optical part includes main and auxiliary LED light sources thermally attached to the heat dissipation part. The electric part includes a rechargeable battery and a circuitry for converting an external AC power source into first and second DC power sources. The auxiliary LED light source is connected to the first DC power source for providing an auxiliary illumination when the external AC power source is normally supplied or to the rechargeable battery for providing an emergency illumination when the external AC power source is interrupted. The main LED light source is connected to the second DC power source for providing normal illumination when the external AC power source is supplied normally. Photoelectric switches are also provided for controlling the action of the auxiliary LED light source.

Abstract: A lighting system is presented that includes a replaceable illumination module removably coupled to a base module. The replaceable illumination module includes one or more solid state lighting elements on a printed circuit board electrically and thermally connected to the base module. The base module may include a heat sink, where the heat sink is in thermal contact with the replaceable illumination module, and dissipates heat generated by the one or more solid state lighting elements during operation of the lighting system. The replaceable illumination module may also include one or more beam conditioning elements for generating a specified beam. The lighting system may be connected to an automated control network and may be automatically controlled thereby, or may be used to control some other system. The heat sink may be generated via a dynamically controllable extrusion die.

Abstract: An LED lamp includes a columnar heat-dissipating member having at least one air passage axially running through its inside; a cooling fan mounted to the heat-dissipating member and to a top end of the air passage; at least one LED disposed on a surface of the heat-dissipating member; and a controller electrically connected with the cooling fan and the LED for enabling the cooling fan to drive the airflow to flow upward and for driving the LED to light up.

Abstract: An illumination apparatus includes a LED assembly having a plurality of LED modules and a substrate. Each LED module includes an anode and a cathode. The substrate is generally planar and defined by a first side and a second side with the LED modules extending from the first side. The second side is defined by a heat dissipation surface, and wherein the first side is opposite the second side. The apparatus also includes a heat sink having a plurality of fins for heat dissipation. A heat input surface portion of the heat sink is bonded to the heat dissipation surface of the LED assembly. The apparatus further includes a control system for supplying electrical energy to the LED assembly, wherein the electrical energy is pulse width modulated.

Abstract: Provided is a light emitting diode (LED) lighting device, which includes a main frame, at least one metal printed circuit board (PCB) provided at the main frame and having at least one LED bulb installed on a lower surface thereof, a heat sink provided on an upper side of the metal PCB, absorbing heat from the LED bulbs, and dissipating the heat into the air, at least one thermoelectric element provided on a lower side of the heat sink and having a heat absorbing part at a lower portion thereof and a heat radiating part at an upper portion thereof, a temperature sensor measuring temperature of the heat sink or the metal PCB, and at least one cooling fan located on an upper portion or a side portion of the heat sink and inducing heat radiating from the heat sink to an outside to cool the heat sink.

Abstract: An LED illuminating apparatus includes a lampshade, a cover engaged with the lampshade, a heat dissipation module received in a hollow tube cooperatively formed by the engaged lampshade and cover, a light source engaged on the heat dissipation module, and two connectors secured at opposite ends of the lampshade and the cover. The lampshade defines a plurality of vents therein. The light source faces the cover and light emitted from the light source radiates out of the LED illuminating apparatus through the cover.

Abstract: It is provided with a light source unit that can be thinner. Further, it is provided with a lighting apparatus and a notice bearing apparatus utilizing the light source unit. A light source unit 10 is configured with a plurality of LED modules 3, 3 and a constant current supplying section 2 consisting of electric components for holding constant of current supplied to the plurality of LED modules 3, 3. The plurality of LED modules 3, 3 and the electric components are aligned on a rectangular plate 11 of a module casing 1. The electric components are arranged between the plurality of LED modules 3, 3.

Abstract: The present invention provides a self-ballasted lamp which efficiently conducts heat of a plurality of LED chips of a light emitting module to its holder, and can prevent the temperature rise of the LED chips. The holder has a base portion, an edge portion provided at one end side of the base portion, which is thick at the base portion side thereof and thin at the distal end side thereof, and heat radiation fins provided at the other end side from the edge part and at the circumference of the base portion. The heat from the semiconductor light emitting elements is conducted from the base portion to the edge part and radiated therefrom. At this time, the edge part is thickened at the base portion side, wherein the thermal capacity is increased, and the heat conduction is improved.

Abstract: An LED lamp includes a columnar heat-dissipating member having at least one air passage axially running through its inside; a cooling fan mounted to the heat-dissipating member and to a top end of the air passage; at least one LED disposed on a surface of the heat-dissipating member; and a controller electrically connected with the cooling fan and the LED for enabling the cooling fan to drive the airflow to flow upward and for driving the LED to light up.

Abstract: An illuminating system includes a system casing and a plurality of illuminating modules. The system casing has a first air-hole area and a plurality of second air-hole areas. One of the adjacent second air-hole areas keeping a first distance from each other keeps a second distance from the first air-hole area. The other one of the adjacent second air-hole areas keeps a third distance from the first air-hole area. The first distance is smaller than or equal to the second distance and smaller than or equal to the third distance. Each illuminating module disposed at the system casing includes a diversion casing having a third air-hole area and a fourth air-hole area. The third air-hole areas are located within the system casing and communicate with the first air-hole area. The adjacent second air-hole areas are respectively corresponding to and respectively communicate with the fourth air-hole areas of different illuminating modules.

Abstract: Greenhouse system may comprise an illumination, a sensor, and a controller. The illumination and controller are arranged to vary the intensity and the spectral distribution of the light emitted by the illumination. The emitted light may be pulsed light, the pulse characteristics being variable by the controller in dependency of the output of the sensor. The controller are arranged to interpret the relevant variables measured by the sensor and to assess the actual and/or expected growth of the relevant plants, and to control the intensity and/or the spectral distribution of the light emitted by the illumination. Some sensors may be provided for measuring the intensity and/or spectral distribution of the actual light in the greenhouse, other sensors for measuring plant dimensions of the relevant plants or plant groups. The illumination may comprise a heat collection which can be connected to heating or air conditioning inside or outside the greenhouse.

Abstract: System and method are provided for controlling emergency lighting where emergency lights turn on when main source of power goes out for controlling emergency lighting to conserve energy utilized by the emergency light, while maintaining good visibility of the emergency lighting. Solid state lighting, such as LED, is used within an emergency light to add light in blue wavelength region matching the light output to the most sensitive of wavelength response of the human eve to increase color perception and allows faster response time. Electrical current to the device and light output are reduced while LED light tends to increase its blue wavelength component as it is dimmed thus increasing effective light output. After a predetermined time, the light is purposefully dimmed to conserve energy and to allow the eye to slowly and safely adjust to the new lighting conditions. By reducing electrical current, energy storage batteries may be smaller than for similar unit that maintains constant light output.

Abstract: A flexible thermal energy dissipating and LED mounting arrangement includes a plurality of LEDs and a flexible thermally conductive sheet. The thermally conductive sheet defines a plurality of openings therethrough each sized to receive and securely hold therein a different one of the plurality of LEDs with the flexible thermally conductive sheet about the opening in physical, thermally conductive contact with the at least one side portion of the encapsulating material. The flexible thermally conductive sheet absorbs thermal energy generated within each of the plurality of LEDs as a result of current flow through the LED circuit and rejects the absorbed thermal energy to an ambient environment surrounding the thermally conductive sheet. The flexible thermally conductive sheet is formable to direct radiation from the plurality of LEDs in multiple directions while securely holding each of the plurality of LEDs within a corresponding one of each of the plurality of openings.

Abstract: This invention is concerned with the control and design of a LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15000 hours, the proposed system can be developed with passive and robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. No extra electronic control board is needed for the proposed passive circuits, which can become dimmable systems if the ac input voltage can be adjusted by external means.

Abstract: A control device includes a rectification circuit, a filter circuit, a detection circuit, a voltage regulator circuit, a constant current circuit and at least one light emitting diode (LED). The rectification circuit is provided for receiving an input voltage of 5 to 24V, and the detection circuit is provided for detecting a quantity of LEDs and an actual required voltage to produce an actual required voltage value, such that the voltage regulator circuit and the constant current circuit can adjust an output current and an output voltage for the LED according to a detection result.

Abstract: An energy-saving lighting fixture includes a light transmissive tubular enclosure including an inner tube defining an inner compartment therein, and an outer tube disposed around and spaced apart from the inner tube to define an outer compartment therebetween. As such, the tubular enclosure has a double-tube structure. A lamp assembly includes at least one lamp device disposed fixedly in the inner compartment of the tubular enclosure.

Abstract: Disclosed herein is a color display device that can be deployed at retail paint stores, kiosks, customers' offices or homes, airports, malls, etc. for rapid color and appearance prototyping. The color display device, which can be mobile, can display color under standardized lighting or simulated ambient lighting. The color display device can augment or replace a traditional paint chip rack or fan deck. The color display device can manipulate light sources additively and/or subtractively using an integrating light mixing capsule or chamber, special optics, mock objects and electronic control for color and appearance representation and for object illumination with desirable simulated ambient lighting.

Abstract: A lighting device comprising a plurality of lighting modules which include a module carrier on which a light source with a plurality of controllable light-emitting diodes emitting light of different wavelengths and arranged on a board, a temperature sensor and a module electronic are arranged. Said module electronic contains a digital circuit with a microcontroller for the local and autonomous signal processing, which actuates the LEDs in dependence on the temperature such that the brightness, color and chrominance of the light mixture composed of the LEDs emitting light of different wavelengths is constant. Said lighting modules being connected with other lighting modules or an external controller via a digital interface for transmitting the board temperature of the respective lighting module detected by means of the temperature sensor. A central master module or the external controller actuates the lighting modules such that a uniform brightness is obtained over the radiating surface.

Abstract: The present invention is based on a regulation circuit (200a, 200b) for making available a constant current supply on the basis of a transformer principle, in which there flows through the luminescent diodes (D1, . . . , DN) a triangular a.c. current (ID) varying periodically around a d.c. current value. With this method it is afforded by means of a circuitry provision that both the charging and also the discharging current (IL1) of an inductive reactance (XL1) connected in series to the luminescent diodes (D1, . . . , DN), functioning as a storage choke (L1) for filtering of mains harmonics, flows as diode current (ID) through the luminescent diodes (D1, . . . , DN). The advantage of this method consists in a significant reduction of the overall power loss (PV, ges) of the LED illumination module (100).

Abstract: Methods and apparatus for providing theatrical illumination. In one example, a modular lighting fixture (300) has an essentially cylindrically-shaped housing (320) including first openings (325) for providing an air path through the lighting fixture. An LED-based lighting assembly (350) is disposed in the housing and comprises an LED module (360) including a plurality of LED light sources (104), a first control circuit (368, 370, 372) for controlling the light sources, and a fan (376) for providing a flow of cooling air along the air path. An end unit (330) is removably coupled to the housing and has second openings (332). A second control circuit (384) is disposed in the end unit, and electrically coupled to and substantially thermally isolated from the first control circuit. The lighting assembly is configured to direct the flow of the cooling air toward the at least one first control circuit so as to effectively remove heat.

Abstract: The invention relates to a light-emitting diode cluster lamp. The light-emitting diode cluster lamp includes a plurality of light-emitting diode lamp packages, a control circuit, and a casing. Each of the light-emitting diode lamp packages includes a heat-conducting/dissipating module and a light-emitting diode module. The control circuit module is used for controlling the light-emitting diode lamp packages. The casing is adapted to accommodate the light-emitting diode lamp packages and the control circuit module. When the light-emitting diode cluster lamp is connected to a power source, the control circuit module selectively makes the light-emitting diode modules emit light. The heat generated during the light emission of each of the light-emitting diode modules is conducted and dissipated by the corresponding heat-conducting/dissipating module of each of the light-emitting diode modules.

Abstract: A white light LED-based lighting device configured for direct form, fit, and function replacement of existing incandescent and fluorescent devices is provided. The white light LED-based lighting device comprises a group of solid state light emitting diodes, electronics to activate the light emitting diodes, and an encapsulating housing configured for direct form, fit, and function replacement of existing fluorescent devices.

Abstract: Lighting fixtures and lighting systems for use in areas with high magnetic fields or areas that require low EMI emissions. The lighting systems include a non-ferrous lighting fixture having an LED light source and a control circuit. The LED light source includes one or more LEDs, and the control circuit provides a regulated operational current to the LED light source. The control circuit includes at least one switch for controlling the flow of current through the control circuit. The switch has a first state and a second state, and the operational current provided to the LED light source is increased and decreased in a linear manner based on the state of the at least one switch.

Abstract: An illuminating device includes: an LED device configured to irradiate light; a temperature detecting unit configured to detect a change in temperature of the LED device; and a unit configured to linearly change a drive current supplied to the LED device according to the change in temperature of the LED device.

Abstract: An illumination apparatus includes an adapter that is detachably and electrically connectable to a socket for a recessed light fitting; a power supply unit in the adapter to supply power; a light emitting device driver in the adapter that generates driving power from the power supplied by the power supply unit; a controller that controls the light emitting device driver; and a light emitting device illumination unit including a plurality of light emitting devices, the light emitting device illumination unit being connectable to the adapter and the light emitting devices receiving the driving power from the light emitting device driver.

Abstract: An LED lighting arrangement comprising at least one LED, for producing light is disclosed. A power supply provides power for the at least one LED. At least one control circuit is coupled to the at least one LED in a way that directly or indirectly uses, to power the at least one control circuit, one or more forward voltage drops across the at least one LED. Beneficially, one or more additional control circuits can be added without redesign of the power supply for the at least one LED.

Abstract: An object is to provide a light-source lamp capable of reducing consumption power while ensuring a certain luminance level and a projector using the light-source lamp. This light-source lamp 1 gathers light from a light source at a lens for emission. The light sources 3, 6 are formed of a plurality of arranged light-emitting diodes 32, 62, and the light sources 3, 6 are driven with pulse-width modulation control of the light-emitting diodes 32, 62. With this, compared with a configuration in which the light sources 3, 6 are subjected to analog control, consumption power of the lamp can be reduced while ensuring a certain luminance level lm.

Abstract: A light system and method includes a housing having an array of LEDs spaced to transmit light within a field of illumination. An EM sensor disposed within the housing is configured to detect EM radiation within the field of illumination. A processor is configured to generate an output in response to levels of EM radiation, such as visible light, infrared light, and/or radio frequency (RF) radiation detected by the EM sensor relative to a predetermined setpoint.

Abstract: A solid-state lighting device (500) includes a plurality of light-emitting elements (510, 525, 530) configured for generating light that are thermally coupled to a heat spreading chassis configured for coupling to one or more heat sinks (520). The lighting device further includes a mixing chamber which is optically coupled to the plurality of light-emitting elements and configured to mix the light emitted by the plurality of light-emitting elements. A control system is operatively coupled to the plurality of light-emitting elements, and configured to control operation of the plurality of light-emitting elements.

Abstract: A light emitting module includes a light source, a light guide plate, and a reflecting mask. The light source includes a circuit board and a light emitting device fixed on the circuit board. The light emitting device includes a plurality of light emitting elements and a control circuit. The light guide plate receives light from the light emitting device and exits from the light guide plate, includes a plurality of light emitting sidewalls, a plurality of reflection walls, and a receiving hole defined in the light guide plate. The receiving hole includes a plurality of light incident sidewalls. The reflecting mask covers the receiving hole, including a bottom surface and a plurality of reflecting surfaces.

Abstract: A liquid-cooled LED lighting device can be provided in which a temporal increase in the temperature of the tubing and the circulation pump when the LED light sources are turned off is prevented to ensure high reliability. The liquid-cooled LED lighting device can include an LED light source, a liquid cooling system including a heat receiving jacket and a radiator, an LED light source-driving power supply for supplying power to the LED light source, and a liquid cooling system-driving power supply for supplying power to the liquid cooling system. The LED lighting device can include a control unit, such as a timer circuit. The control unit can maintain supply of the power to the liquid cooling system for a predetermined period of time after supply of the power to the LED light source is stopped.

Abstract: A LED lighting assembly comprising at least one LED; the at least one LED being mounted to a support; at least one solar element for creating electric power from solar power; at least one battery for storing electricity generated by the solar element; at least one wind vane operatively associated with the support; at least one motor/generator having a first mode for generating electric power from the wind turbine; and at least one shaft operatively connected to the at least one motor/generator and the support; the motor/generator having a second mode in which the motor/generator operates to rotate the support; the at least one motor/generator being operatively connected to the at least one battery for storing electric power therein.

Abstract: An LED based omni-directional light engine includes a toroidal lens coupled to a controller circuit board and two or more evenly spaced LEDs mounted to the controller circuit board. The toroidal lens includes an inner surface coated with a layer of reflection materials, an outer surface, and a flat base surface. The controller circuit board is electrically coupled to a power source. The LEDs are located immediately under the flat base surface. The inner surface substantially reflects light beams emitted from the LEDs to the outer surface which refracts the beams to the omni-directions.

Abstract: A lighting assembly using light emitting diodes provides low leakage current that does not require an external ballast. The lighting assembly can replace a fluorescent tube light while providing a more comfortable and steady light source, consuming less power and with enhanced longevity. The lighting assembly includes a tube, a light emitting diode panel disposed within the tube, a circuit board disposed within the tube, and insulation disposed between the light emitting diode panel and the circuit board. At least a portion of the tube is translucent. The light emitting diode panel includes light emitting diodes, and the circuit board includes a driving circuit for driving the light emitting diodes.

Abstract: The present invention provides an integrated self-contained lighting module which can be used on its own, or in conjunction with other modules to produce white light, or light of any other colour within the colour spectrum. Each module comprises one or more light-emitting elements, a drive and control system, a feedback system, thermal management system, optical system, and optionally a communication system enabling communication between modules and/or other control systems. Depending on the configuration, the lighting module can operate autonomously or its functionality can be determined based on either or both internal signals and externally received signals.

Abstract: An optical engine includes a receiving chamber and three light source modules. Each light source module includes a positioning board, a heat dissipating plate, and a light source unit. The heat dissipating plate is sandwiched between the light source unit and the positioning board and adhered to the corresponding light source unit. The light source unit is installed on the receiving chamber. The positioning board is matched with the light source unit and installed on the receiving chamber.

Abstract: A light emitting diode (LED) light unit is disclosed. For example, the LED light unit includes at least one support plate having one or more inner openings. At least one LED array may be coupled to an LED board. The LED light unit also includes at least one heat pipe coupled to the LED board, wherein said LED board is coupled to the at least one support plate.

Abstract: An LED lamp includes a bracket, a plurality of first LED modules mounted on a center of the bracket, a second LED module mounted on a foreside of the bracket and spaced from the first LED modules, and a driving circuit board mounted on a rear end of the bracket and electrically connecting with the second LED module and the first LED modules. The driving circuit board comprises a chip automatically monitoring operating status of the first LED modules and automatically controlling activation of the second LED module when failure occurs on at least one of the first LED modules.

Abstract: An LED module (10) comprising a thermally conductive circuit board (12); at least one LED chip (14a to 14f) mounted on the thermally conductive circuit board (12); at least one temperature sensor (24) mounted on the thermally conductive circuit board (12), for determining the temperature of the at least one LED chip (14a to 14f); an optical arrangement (16), which is arranged above the at least one LED chip (14a to 14f) and is mounted on the thermally conductive circuit board (12), wherein the optical arrangement (16) has at least one light-guiding section (20); and a light sensor (18) arranged on the thermally conductive circuit board (12), said light sensor being arranged with respect to the at least one light-guiding section (20) in such a way that it can sense light guided in the light-guiding section (20).

Abstract: A luminaire drive circuit (1) comprises an AC to DC power supply (2) delivering DC power to rails (3), and a plurality of LED drive circuits (4) connected across the rails to receive DC power. Each LED drive circuit (4) comprises a plurality of LEDs (7) in series and a voltage and current controller (6) for controlling current through the LEDs and a voltage across the LEDs which is less than the voltage across the rails. In one example, each LED circuit (4) has a dedicated sensor (52) to detect proximity of an illuminated object. This allows control of illumination intensity both for energy efficiency and visual effect. The proximity sensor may be simply a photodiode (52) mounted to detect extent of light reflected from the objects (FIG. 5), thus avoiding need for a self-contained proximity sensor such as one of the ultrasonic type.

Abstract: A modular, standalone, and multi-functional electronic and mechanical platform for light-emitting diode (LED) lighting applications that has continuous and adjustable color temperature (CT) is provided. In particular, a modular LED device is utilized as a standalone lighting device or, alternatively, as a universal and generic building block for forming lighting devices for lighting application. The modular LED device includes an LED circuit, a digital signal processor (DSP), a network interface, and a power supply that can be packaged in a compact, thermally controlled housing. Additionally, the housing can provide alignment and fastening mechanisms for easily coupling one modular LED device to another modular LED device.

Abstract: An LED array and a method for controlling such an array is described. The array includes one or more LED-optical sensor pairs in which the optical sensor measures the light output of the associated LED. In some forms of the invention, the optical sensors are provided with filters to attenuate light at a wavelength different to that of the LED associated with that optical sensor. In some forms of the invention, the LED-optical sensor pairs are at least partially shielded from extraneous light. In one form of the invention a plurality of sets of LEDs is provided, each set outputting light having a different frequency and each set being controllable to provide a desired light output.

Abstract: An LED lighting fixture compatible with existing incandescent lamp lighting fixtures. The heat produced by the LED light source is dissipated through a heat pipe into a ground hole to maintain an optimum operation temperature of the LED light source.

Abstract: The invention relates to a system comprising a plurality of light emitting diodes, LEDs. The LEDs may be controlled in various in various manners in order to obtain any of one or more objects of the system. Thus, LEDs may be controlled for by controlling at least two of the following parameters: the luminous intensity of each of the LEDs, the luminous flux of each of the LEDs, the colour spectrum of the light being emitted from each of the LEDs, the spatial radiation pattern of the light being emitted from each of the LEDs, the spatial radiation pattern of the system, the junction temperature of each of the LEDs, the temperature of the surroundings to the LED, the amperage of the electrical power being supplied each or sections of the LEDs, the voltage of the electrical power being applied the LEDs and pulsing applied to the electrical power being applied each or sections of the LEDs.

Abstract: An illumination device comprises on a common substrate (10) at least one LED (11) of a first color, preferably blue, at least one LED (12) of a second color, preferably red, and preferably at least one LED (13) of a third color, preferably green, and at least one white LED (14). An illumination control apparatus (8) for an illumination device (1) comprises differing controllable power sources (83) for LEDs of differing colors for producing independently controlled operation signals for said LEDs of differing colors, differing output terminals (84) for the LEDs of differing colors for supplying the independently controlled operation signals to said LEDs of differing colors, and a first control means (81) for generating operation control signals for the controllable power sources. An illumination system comprising one or more above-mentioned illumination devices and one or more above-mentioned illumination control apparatuses.