Abstract: An occupancy sensor with integral light level sensors is configured to turn off or disable peripheral circuits and go into a periodic deep sleep mode to reduce phantom loading. Peripheral circuits include occupancy sensor circuits and relay drive circuits, but may include other circuits such as communication circuits. The sensor may be configured to periodically wake itself up, check ambient light conditions to see if lighting is below the set threshold. If it is not, the sensor goes back to sleep. If it is, then the sensor can power up the occupancy sensor circuit to see if the space is occupied; if not, it can go back to sleep. If the space is occupied, it can turn on other peripheral circuits necessary to control the load.

Abstract: At least one controllable source of visible light is configured to illuminate a space to be utilized by one or more occupants. A controller causes the source(s) to emit light in a manner that varies at least one characteristic of visible light emitted into the space over a period of time at least in part in accordance with a chaotic function.

Abstract: Disclosed herein is a controlling apparatus for controlling an inputting and outputting apparatus of the active matrix driving type including pixels each having an electroluminescence element whose operation can be changed over between light emitting operation and light receiving operation in response to a voltage applied thereto, including: a removing section for removing, when the light receiving operation is to be performed by the electroluminescence element included in a predetermined pixel, charge accumulated. in a parasitic capacitance upon the light emitting operation performed immediately before the light receiving operation by the electroluminescence element; and a detection section for detecting light inputted from the outside to the inputting and outputting apparatus based on an output from the predetermined pixel including the electroluminescence element whose charge has been removed from the parasitic capacitance thereof by the removing section.

Abstract: An illumination control system includes: illumination apparatuses having respective addresses and perform a dimming control in response to a dimming signal inputted from an outside, and an illumination control terminal which has an imaging device, a capturing range of which is set to include illumination ranges of the illumination apparatuses. The illumination control terminal segments an image captured by the imaging device into a plurality of areas so that the areas correspond to the illumination ranges, detects a person based on the captured image, determines a segmented area in which the person is present if the person has been detected and performs dimming control on an illumination apparatus corresponding to the determined segmented area.

Abstract: A method for sustaining a plasma includes providing a volume of a gas; generating illumination of a first selected wavelength; and forming a first plasma species in a first region of the gas and a second plasma species in a second region of the gas by focusing the illumination of the first wavelength into the volume of gas, the first region having a first average temperature and a first size, the second region having a second average temperature and a second size, the illumination of the first selected wavelength transmitted by the second plasma species, the illumination of the first selected wavelength absorbed by the first plasma species by tuning the first selected wavelength of the illumination to an absorption line of the first plasma species, the absorption line being associated with an ionic absorption transition or an excited neutral transition of the first plasma species.

Abstract: According to one embodiment, a lighting control unit turns on luminaires corresponding to a presence area among four detection areas adjacent to one another in a predetermined direction and a crossing direction. If there is one presence area among the four detection areas, the lighting control unit relatively reduces the brightness of the luminaires corresponding to remaining three absence areas. If there are two presence areas among the four detection areas, the lighting control unit relatively reduces the brightness of the luminaires on a side adjacent to the presence areas among the luminaires corresponding to the remaining two absence areas and turns off the remaining other luminaires. If there are three presence areas among the four detection areas, the lighting control unit turns off the luminaires corresponding to the remaining one absence area.

Abstract: The present disclosure relates to an LED-based lighting component that can control the color rendering capability of its generated light based on the presence or characteristics of ambient light. In one embodiment, the lighting component may employ at least two different types of LEDs to generate light. Control circuitry of the lighting component is able to monitor ambient light and drive the LEDs based on an ambient light characteristic that is indicative of the CRI of the ambient light. If the ambient light characteristic is indicative of the ambient light having a lower CRI, the control system will drive the LEDs to emit light with a defined CRI. If the ambient light characteristic is indicative of the ambient light having a higher CRI, the control system will drive the LEDs to emit light with a reduced CRI, which is lower than the defined CRI.

Abstract: The present disclosure relates to a modular lighting system that may include a driver module, an array of LEDs that are driven by the driver module, and one or more auxiliary modules. The auxiliary modules are configured to control the driver module, which in turn drives the LEDs of the array of LEDs in a desired fashion. The auxiliary module may provide a bridge for communications with one or more remote lighting control systems through wired or wireless communications and function to control the driver module accordingly. Other exemplary auxiliary modules may include modules that function to control the driver module based on one or more of ambient light, ambient temperature, room occupancy, emergency lighting requirements, and the like.

Abstract: A lighting network where control of the lighting fixtures in the network may be distributed among the lighting fixtures. The lighting fixtures may be broken into groups that are associated with different lighting zones. Certain lighting fixtures will have or be associated with one or more sensors, such as occupancy sensors, ambient light sensors, and the like. Within the lighting network or the various lighting zones, lighting fixtures may share sensor data. Each lighting fixture may process sensor data provided by its own sensor, a remote standalone sensor, or lighting fixture, and process the sensor data according to the lighting fixture's own internal logic to control operation. The lighting fixtures may also receive control input from other lighting fixtures, control nodes, light switches, and commissioning tools. The control input may be processed along with the sensor data according to the internal logic to further enhance control of the lighting fixture.

Abstract: An illumination system includes lighting apparatuses (20), a camera (11), an image processing unit (12) (person position detection unit), and a lighting control unit (14) and a storage unit (13) (control unit). The illumination apparatuses (20) are placed on a ceiling surface (C), and each include a first light source (24) and a second light source (25) that irradiate a floor surface (F) and the ceiling surface (C) with light, respectively. The control unit controls an illumination apparatus (20b2) corresponding to a person (P)'s position detected by the person position detection unit among the illumination apparatuses (20) so as to turn on the first light source (24). The control unit controls at least one of one or more illumination apparatuses (20) that are each adjacent to the illumination apparatus (20b2) so as not to turn on the first light source (24) and turn off the second light source (25).

Abstract: Intelligent lighting is provided to motorists traveling down a stretch of road by sequentially turning on adjacent lighting devices in a lighting segment only when required, such as when vehicles are approaching the lighting devices, and turning off the lighting devices or decreasing a light intensity output of the lighting devices to a predefined minimum lighting intensity output level when no vehicles are present. In addition, which bulb to use in a multi-bulb lighting device is determined, as well as the optimal lighting intensity level of the selected bulb. Further, it is determined which lighting devices in a lighting segment may be turned off or dimmed while maintaining a predefined minimum safe light/brightness level along a pathway associated with the lighting segment.

Abstract: A plurality of LEDs arranged in groups, each group comprising at least one LED, a control circuit for driving the LEDs, the control circuit comprising a sensing device for sensing an operative parameter of the LEDs. The control circuit is arranged to: a) operate at least one group of the LEDs: b) sense by the sensing device a value of the operative parameter of the at least one group; c) repeat a) and b) for at least a different one of the groups; d) assign to each of the groups of LEDs a value of the operative parameter from the sensed operative parameter values; and e) control the driving of the groups of LEDs from the assigned operative parameter values.

Abstract: A lighting device comprises a plurality of light sources (61) fixedly mounted on a support. At least one of the light sources is operable independently of the other light source(s), and optionally every one of the light sources is operable independently of every other light source. The lighting device has an optical system (62) for directing light from each light source along respective directions different from one another. The axes and illumination patterns of the optical system subscribe 360° in the plane of the lighting device. The lighting device is preferably operable in at least a first mode in which the lighting device provides directional lighting and a second mode in which the illumination provided by the lighting device subscribes substantially 360° in the plane of the lighting device.

Abstract: A lighting control system includes lighting devices arranged along a road for a moving body. Each lighting device includes a sensor that detects a moving body approaching the lighting device, a light source that emits light, a sensor that detects the moving body, a control unit connected to the sensor and the light source, and a communication unit. The sensor of the one of the lighting devices located in at least at one outermost position of the lighting devices has a higher detection frequency than the sensors of the other lighting devices.

Abstract: A lighting system includes multiple light sources, a sensing unit, and a control system. The light sources have different emission spectra, and the sensing unit is configured to measure a spectral content of light. The control system may be configured to use measurements from the sensing unit to select respective intensities for emissions from the light sources and then independently control the light sources to emit the respective intensities. In particular, the control system can select and render a spectral distribution selected based on the light reflected from objects that are being illuminated or render a spectral distribution to supplement light from other light sources and achieve a lighting objective.

Abstract: A vehicle control device mounted on a vehicle for performing communication with a mobile device and performing predetermined control in accordance with communication contents with the mobile device, having a locking operation unit that locks or unlocks doors of the vehicle, interior signal transmitting and receiving units that detect a position of the mobile device left in an interior of the vehicle in a case where a locking operation is performed by the locking operation unit, and an interior lamp drive control unit that lights an interior lamp among a plurality of interior lamps provided in the interior of the vehicle, the interior lamp being close to the position of the mobile device based on information of the position detected by the interior signal transmitting and receiving units.

Abstract: The system of the indention is applied to sunless enclosed spaces suitable for agricultural use. A growing zone is seeded with a particular crop variety. The crop growth is optimized by receipt of a specific light emissions. A light emitting computer comprising an array of light emitting devices, a microprocessor, a radio frequency receiver and a storage device is disposed optimally over the growing zone to bath the zone uniformly in the specific light emission for optimal growth. A radio frequency identification tag is placed within the growing zone to electrically define the growth zone for the light emitting computer. The RFID tags emit a crop variety specific radio frequency that is received by the radio frequency receiver. The appropriate light emission profile related to the radio frequency is retrieved from a digital look-up table. The emitting computer then emits the light emission profile.

Abstract: Disclosed herein are apparatus, methods, and systems for illuminating roadways, paths, tunnels, bridges, and areas adjacent to such in a manner which minimizes glare and/or other adverse lighting effects commonly experienced by night-time drivers. According to aspects of the invention, horizontal and vertical aiming of a plurality of solid-state light sources permits projected light from a fixture to be tailored to roadway features (e.g., bends in the road) and in some cases, permits the mounting height of fixtures to be reduced which can make the envisioned system a cost-effective alternative to traditional roadway lighting.

Abstract: One embodiment of the invention relates to a system for operating a plurality of streetlights in response to motion from a vehicle. The system includes a sensor associated with at least one of the streetlights and configured to detect the presence of a moving vehicle and to provide a signal representative of the moving vehicle. The system further includes a radio frequency transceiver associated with each of the streetlights. The system yet further includes processing electronics configured to receive the signal representative of the moving vehicle from the sensor and to cause the radio frequency transceiver to transmit a command to one or more of the plurality of the streetlights to change lighting states along a pathway for the vehicle.

Abstract: In embodiments of the present invention improved capabilities are described for systems and methods that provide for a power outage lighting management within an environment, comprising a power outage detection device adapted to detect a power outage condition and to wirelessly transmit power outage indication data to a plurality of lighting systems within the environment, where at least one of the plurality of lighting systems include an LED light source that is powered by an internal power source.

Abstract: A lighting device includes a DC/DC power converter, a controller/processor electrically connected to the DC/DC power converter, a light emitting diode (LED) current control circuit communicably coupled to the controller/processor and electrically connected to the DC/DC power converter, and two or more LEDs comprising at least a first color LED and a second color LED electrically connected to the LED current control circuit. The LED current control circuit provides an on/off signal having a cycle time to each LED in response to one or more control signals received from the controller/processor such that the two or more LEDs produce a blended light having a specified color based on how long each LED is turned ON and/or OFF during the cycle time.

Abstract: A lighting fixture system for fluorescent lamps includes one or more fluorescent lamps and one or more ballasts configured to provide controlled power to the one or more fluorescent lamps. The lighting fixture further includes a controller wired to the fluorescent lighting fixture. The controller includes one or more relays configured to turn power provided to the one or more ballasts on and off such that the one or more fluorescent lamps turn on and off with the switching of the one or more relays. The controller further includes a logic circuit configured to control the switching of the one or more relays, wherein the logic circuit is configured to log usage information for the fluorescent lighting fixture in memory. The controller yet further includes communications electronics configured to output the logged usage information.

Abstract: A lighting device includes a DC/DC power converter, a controller/processor electrically connected to the DC/DC power converter, a light emitting diode (LED) current control circuit communicably coupled to the controller/processor and electrically connected to the DC/DC power converter, and two or more LEDs comprising at least a first color LED and a second color LED electrically connected to the LED current control circuit. The LED current control circuit provides an on/off signal having a cycle time to each LED in response to one or more control signals received from the controller/processor such that the two or more LEDs produce a blended light having a specified color based on how long each LED is turned ON and/or OFF during the cycle time.

Abstract: In a lighting control system according to an embodiment, a storing unit stores a correspondence relation in which at least one of a plurality of type 2 groups is associated with each of type 1 groups. Methods of distribution of K luminaires are different in the type 1 groups and the type 2 groups. The control unit controls a lighting state of the type 1 groups indicated by an input control signal and subjects a lighting state of the type 2 groups associated with the type 1 groups to be controlled in the correspondence relation to associated control.

Abstract: In a lighting system (SLS), a radar arrangement (RU1) transmits a signal (CW). The radar arrangement (RU) detects a spectral power distribution of a received signal (RF) susceptible of comprising a reflection of the signal that has been transmitted. Lighting is controlled as a function of the spectral power distribution that has been detected.

Abstract: An ad-hoc luminaire-controlling system communicates with nearby luminaires to identify a luminaire cluster. During operation, the system detects light patterns emitted by one or more remote luminaires, and identifies the remote luminaires from the detected light patterns. The system then identifies a luminaire cluster that includes a local luminaire and one or more of the identified remote luminaires. A central or mobile luminaire-controlling system receives a cluster description from one or more luminaires, and determines a luminaire topology based on the received cluster descriptions. Each cluster description identifies a set of luminaires that are can see each other's light. The central or mobile system can generate a state-modifying command for a set of target luminaires in a cluster based on the luminaire topology, and sends the state-modifying command to the target luminaires.

Abstract: A directionally active projection device is described that includes a planar display providing a pattern of information. The planar display includes regions of light transparency and regions for blocking light transmittance. The directionally active projection device also includes a lens arranged adjacent to the planar display, and a collection of light sources arranged as an array in a focal plane of the lens. Also described are methods of controlling directionally active projection devices.

Abstract: A light source device includes an LD module having a plurality of small light sources such as LDs, a control device selectively controlling On/Off of a plurality of the LDs, a first optical system collecting light emitted from the LDs into one collected light, and a second optical system emitting the collected light directly or through an optical process as source light. The control device maintains a constant amount of luminescence of the light source by controlling a number of the LDs selectively turned on in order to achieve a simple configuration of the light source device and a proper gradation expression of images.

Abstract: An energy efficient lighting fixture includes a light emitting diode section, a first high intensity fluorescent section having a first bulb and provided adjacent the light emitting diode section, and a second high intensity fluorescent section having a second bulb and provided adjacent the light emitting diode section. The fixture also includes a first reflector partially surrounding the first bulb and a second reflector partially surrounding the second bulb.

Abstract: Systems and methods of providing illumination may be provided in accordance with the invention. A lighting unit may be provided comprising a plurality of light sources, each light source of said plurality being at least partially surrounded by an optical element, and a support configured to support the light source above a surface. The light sources may be light emitting plasma sources, and the support may be a high-mast support. In some embodiments, the optical element may be a reflector containing one or more facets, directing the light toward the surface. In some configurations, each light source of said plurality may be independently controllable and/or dimmable. A lighting unit may communicate with an external controller, which may provide instructions for controlling the light sources. A lighting system may be provided with a host controlling a plurality of lighting units, which may be organized into zones. The zones, lighting units, and/or light sources may be independently controllable.

Abstract: The invention discloses an illumination system having a first proximate detector with a first zone detector and a first transmitter. The first zone detector can detect the passing of a human body and the transmitter can send a signal upon such detection. The invention may further include a second zone detector and a second transmitter having similar capacities. In addition, the invention may also have a first staircase illuminator and a second staircase illuminator. Detection of a person passing near a zone detector may cause a staircase illuminator to illuminate a staircase area. The process of transmitting, receiving and illuminating may continue for as long as any of the illuminators within the illumination system that has not yet been illuminated.

Abstract: This disclosure describes systems and techniques for managing streetlights. The subject matter included in this document is embodied in a method that includes receiving, at a computing device, information representative of a location and status of a streetlight included in a network of streetlights. The method also includes presenting a representation of the streetlight in a graphical user-interface in accordance with the received location and status information, and receiving information representing a selection of the streetlight for inclusion in a group of streetlights from the network. The method further includes initiating delivery of one or more control signals to the group of streetlights.

Abstract: An light device, includes a plurality of first light cells arranged axisymmetrically about an axis; a plurality of second light cells arranged axisymmetrically around the axis; and a controller coupled to a brightness adjust unit, and determines whether to activate the first light cells and second light cells according to a brightness adjust value of the brightness adjust unit, wherein the average distance between the first light cells and the axis is shorter than the average distance between the second light cells and the axis.

Abstract: A driving circuit includes a switch, a detecting unit, and a current supply unit. A first terminal of the switch is used for coupling to a first terminal of a first LED group of a plurality of LED groups and receiving a first voltage, and a third terminal of the switch is used for coupling to a first terminal of a last LED group of the plurality of LED groups. The detecting unit is used for outputting a switch control signal to a second terminal of the switch for controlling turning-on and turning-off of the switch. The current supply unit has a plurality of input current terminals, and a ground terminal coupled to ground, where each input current terminal of the plurality of input current terminals is used for coupling to a second terminal of a corresponding LED group of the plurality of LED groups.

Abstract: In the lighting control device according to the exemplary embodiment, the detection section detects the presence or absence of a person in a lighting area and a movement speed of a person, based on an image data of the lighting area that is lighted by a light source of a plurality of lighting apparatuses and is acquired from an imaging device. A decision section decides whether each of division areas is a stay area or a non-stay area based on the movement speed of a person detected by the detection section. A lighting control section performs different lighting controls on the lighting apparatus of the division area decided as the stay area by the decision section and the lighting apparatus of the division area decided as the non-stay area.

Abstract: An illumination system monitors light output of a solar powered light source and controls power to an alternate light source having a secondary power source. The solar powered light source is an array of light emitting diodes. The alternate light source is in the form of fluorescent lights. A sensor photocell is positioned to sense illumination output from the solar powered array. A control mechanism senses a signal from the photocell sensor and turns power on and off to the alternate light source according to the light output sensed from the solar powered source.

Abstract: The invention discloses an illumination system and a control method of illumination system. The illumination system includes a portable electronic apparatus, a lamp-controlling module and at least one lamp. The control method of an illumination system includes following steps: generating a wireless control signal according to a color distribution of a selected pattern; generating a lamp-controlling signal according to the wireless control signal; respectively adjusting a light-emitting state of the lamp according to the lamp-controlling signal.

Abstract: A wavelength sensing lighting system may include a light source, a sensor and a controller. One or more light sources and sensors may be included in an array. The light source may emit an illuminating light and the sensor may sense an environmental light. The illuminating light may include data light. The lighting system may include a plurality of nodes connected in a network. The nodes may communicate by emitting and receiving the data light, which may be analyzed by the controller. The light source and the sensor may be provided by a light emitting semiconductor device that is capable of emitting illuminating light and receiving environmental light. A conversion material may convert the wavelength of a source light into a converted sight.

Abstract: A direct-view display apparatus includes a transparent substrate, an internal light source, a plurality of light modulators coupled to the transparent substrate, and a controller for controlling the states of the plurality of light modulators and the internal light source. The controller is configured to cause the display to transition from one of a transmissive, reflective and transflective mode, to a second of said modes.

Abstract: A lighting system according to embodiments includes a first light source, a second light source, a first lighting circuit, a second lighting circuit, a first optical sensor; and a control circuit. The first light source is configured to emit light a half-value width of which is 100 nm or more. The second light source is configured to emit light the half-value width of which is less than 100 nm. The first lighting circuit is configured to light the first light source. The second lighting circuit is configured to light the second light source. The control circuit is configured to perform a lighting control of the first lighting circuit on the basis of a detection value of the first sensor, and perform a lighting control of the second lighting circuit on the basis of a value which is predetermined when operating the first sensor.

Abstract: A light emitting diode (LED) controller for controlling a plurality of LED channels includes channel select circuitry, detection circuitry, and error processor circuitry. The channel select circuitry is configured to drive N?1 LED channels of a plurality of (N) LED channels at a nominal modulation frequency and to selectively drive a selected one of the N LED channels at a probe modulation frequency. The detection circuitry is configured to receive a composite brightness signal corresponding to brightness signals from the N LED channels. The detection circuitry is further configured to filter the composite bright signal and generate a selected brightness signal corresponding to a brightness of the selected LED channel at the probe modulation frequency. The error processor circuitry is configured to compare the selected brightness signal to user defined and/or preset photometric quantities and generate a control signal for adjusting the brightness of the selected LED channel.

Abstract: A memorial display system is described including at least one memorial device having a plurality light fixtures with each light fixture having at least one light source. Each of the light sources are in electrical communication with a controller circuit that automatically activates and deactivates the at least one light source of each light fixture according to at least one anniversary date and for a duration period stored in the memory. In one embodiment, each light source is part of a light bar with up to 5 lights. The light bars are commonly strung together to create various runs of lighting opportunities allowing for different overall sizes of the automated memorial system.

Abstract: A controller includes a communication interface for communicating with at least one illumination and a plurality of home appliances; a memory for storing a corresponding relationship between the plurality of home appliances and a lighting up scheme of the illumination; and a processor for obtaining, upon receiving a signal from one of the plurality of home appliances indicating the state thereof, a lighting up scheme corresponding to the home appliance on the basis of the corresponding relationship, using the communication interface, and for instructing at least one illumination to light up in accordance with the lighting up scheme.

Abstract: A method for open-loop and closed-loop control of a lighting busway with a primary luminaire and at least one secondary luminaire for an interior space, involves measuring a brightness at the location of the primary luminaire, determining a primary ambient light percentage for the primary luminaire, determining a secondary ambient light percentage for at least one secondary luminaire based on the primary ambient light percentage, and determining a secondary manipulated variable for at least one secondary luminaire based on the secondary ambient light percentage and a setpoint value for this secondary luminaire.

Abstract: A utility light is provided. The utility light comprises a first array of light sources having a first color facing in a first direction, a second array of light sources having a second color facing in a second direction that substantially opposes the first direction, a motion sensor, and an electronic controller to receive a rotation motion input from the motion sensor, wherein the rotation motion input provides an indication of rotation of the utility light about an axis substantially vertical to the surface of the earth, to determine a first state based on the rotation motion input, to operate the first array of light sources in the first state, to determine a second state based on the rotation motion input, and to operate the second array of light sources in the second state.

Abstract: An image display device includes: excitation light source (5), fluorescent screen (6) provided with a plurality of phosphor regions (61, 62, 63) that are arranged periodically in the in-plane direction, the regions between phosphor regions being retroreflective regions (64) that bend incident light in the direction opposite the direction of incidence of the light; scanning means (4) that scans fluorescent screen (6) with a light beam from excitation light source (5); optical detection means (2, 3) that detects retroreflective light (7) that is reflected by retroreflective regions (64); and control means (1) that causes scanning by scanning means (4), detects boundaries between each phosphor region (61, 62, 63) and retroreflective region (64) on fluorescent screen (6) based on output of optical detection means (2, 3), and controls the light emission timing of excitation light source (5) based on the detected boundaries.

Abstract: The present invention provides apparatus and methods for controlling the illumination throughout an area where even and constant lighting is not required. The invention includes one or more light sources, such as luminaires, the status of which is controlled by a controller responsive to a sensor for detecting a parameter of interest. Preferably the sensor detects motion of a subject moving through the area of controlled illumination. Each independent controller may receive and transmit signals indicative of the status of one or more nearby light source for determining and controlling the lighting status of the light source with which it is in controlling communication. The determining by the controller is preferably carried out by a programmed microprocessor. The communication between controllers may be wireless. The signals communicated among controllers may be hierarchical for determining whether a response is required and what the response might be.

Abstract: Exemplary systems, methods, and apparatuses for distributed intelligence in facility lighting control are provided. A facility lighting system may be organized into multiple control areas, each of which may include one or more component devices. Each lighting control area may be associated with a control apparatus, which controls the operation of the lighting devices of the associated control area based on various types of signal information. Signal information may include information concerning local conditions or environments, as well as information from a centralized control server. Some embodiments further include monitoring the operation and predicting fault states of the lighting control area.

Abstract: An illumination system includes multiple light emitting devices arranged in an area so as to be spaced apart from each other. Each light emitting device includes multiple light emitting diode arrays each of which has one light emitting diode or a plurality of light emitting diodes connected in series. The numbers of the light emitting diodes included in each light emitting diode arrays differs from each other. A controller is configured to establish one or more groups each including one or more light emitting devices and adjust an illumination state of each light emitting device by controlling the driving state of the one or more light emitting diode arrays included in each light emitting device. The controller may select the number of light emitting devices included in each group based on an external condition.

Abstract: Described herein are day lighting systems that utilize a combination of at least one natural light source with at least one multimode artificial light source. Also disclosed are methods for designing and operating such systems.