Abstract: In embodiments, a first light engine produces a first light spectrum having a first CCT. A second light engine produces a second light spectrum having a second CCT. The first light spectrum is emitted from a first region of an enclosure; a second light spectrum is emitted from a second region; and a mixture is emitted from a third region that separates the first and second regions. The second CCT is less than the first CCT; a difference between the first and second CCTs is at least 10,000K. The first light spectrum may have a first emission peak in a range of 450 to 480 nm and a second emission peak in a range of 380 to 420 nm. The second light spectrum may have a third emission peak in a range of 480 to 500 nm and a fourth emission peak in the range of 450 to 480 nm.

Abstract: Embodiments include a lighting device that includes a first illumination source comprising a light-emitting diode (LED) of a first color that generates a first light output with a first melanopic ratio of greater than 0.8, and a second illumination source comprising an LED of a second color that generates a second light output with a second melanopic ratio that is less than the first melanopic ratio. The lighting device also includes a light distribution unit for directing and distributing illumination generated by the first and second illumination sources, where at least one of the first illumination source and the second illumination source is affixed to the light distribution unit, and where the first and second illumination sources are oriented relative to one another such that their respective light outputs are directed in different directions.

Abstract: In embodiments, a first light engine produces a first light spectrum having a first CCT. A second light engine produces a second light spectrum having a second CCT. The first light spectrum is emitted from a first region of an enclosure; a second light spectrum is emitted from a second region; and a mixture is emitted from a third region that separates the first and second regions. The second CCT is less than the first CCT; a difference between the first and second CCTs is at least 10,000K. The first light spectrum may have a first emission peak in a range of 450 to 480 nm and a second emission peak in a range of 380 to 420 nm. The second light spectrum may have a third emission peak in a range of 480 to 500 nm and a fourth emission peak in the range of 450 to 480 nm.

Abstract: A method, system and computer-readable medium of utilizing artificial lighting regulate a circadian clock of a human. By utilizing light emitting diodes (LEDs) that emit wavelengths associated with human opsin absorption spectra, a device may stimulate opsins in the human. For example, the device may replicate normal sunlight (e.g., based on season or time of day) by emitting light that changes in rhythmic intensity or spectral modulation.

Abstract: Lighting apparatuses include an enclosure around first and second light engines. The enclosure has a diffuser over first, second and third regions. The first and second regions are separated by the third region; a first light spectrum is emitted from the first region; a second light spectrum is emitted from the second region; and a mixture of the spectrums is emitted from the third region. In some embodiments, the first spectrum has a CCT?7000K; the second spectrum has a CCT?6500K. In some embodiments, the first spectrum has a first CCT?3500K; the second spectrum has a second CCT?6500K; the second CCT<first CCT and the difference between the CCTs is at least 1000K. In some embodiments, the first spectrum has a color bounded by a first set of chromaticity coordinates, and the second spectrum has a color bounded by a second set.

Abstract: Embodiments include a lighting device that includes a first illumination source comprising a light-emitting diode (LED) of a first color that generates a first light output with a first melanopic ratio of 0.4 to 1.2, and a second illumination source comprising an LED of a second color that generates a second light output with a second melanopic ratio that is less than the first melanopic ratio. The lighting device also includes a light distribution unit for directing and distributing illumination generated by the first and second illumination sources, where at least one of the first illumination source and the second illumination source is affixed to the light distribution unit, and where the first and second illumination sources are oriented relative to one another such that their respective light outputs are directed in different directions.

Abstract: Embodiments include a lighting device that includes a first illumination source comprising a light-emitting diode (LED) of a first color that generates a first light output with a first melanopic ratio of greater than 0.8, and a second illumination source comprising an LED of a second color that generates a second light output with a second melanopic ratio that is less than the first melanopic ratio. The lighting device also includes a light distribution unit for directing and distributing illumination generated by the first and second illumination sources, where at least one of the first illumination source and the second illumination source is affixed to the light distribution unit, and where the first and second illumination sources are oriented relative to one another such that their respective light outputs are directed in different directions.

Abstract: A light emitting diode (LED) with a melanopic emission spectrum can comprise a primary light source and a phosphor. The primary light source can comprise an emission spectrum comprising a first peak centered at a wavelength from 480 nm to 500 nm. The phosphor, when excited, can comprise an emission spectrum with a second peak centered at a wavelength from 640 nm to 750 nm, and the intensity of the first peak is greater than the intensity of the second peak. A light emitting apparatus can comprise a first LED with a traditional white light emission spectrum, and a second LED with a melanopic emission spectrum. The light emitted from the apparatus can comprise chromaticity coordinates, in the CIE 1931 color space diagram using the 196410° Supplementary Standard Observer, that are within a one-step MacAdam ellipse from the black body locus with chromaticity coordinate x from 0.34 to 0.45.

Abstract: Lighting control systems are disclosed, which are configured to detect a rate at which a total current from a current driver is being changed. The total current is an amount of current for a plurality of LED channels comprising a first LED channel and a second LED channel. The systems are also configured to control a first current to the first LED channel and a second current to the second LED channel, the first current and the second current each being a portion of the total current. The controlling comprises: when the rate is detected as being a first slope, changing a ratio of the second current to the first current; and when the rate is detected as being a second slope different from the first slope, keeping the ratio constant while the total current is adjusted according to the dimmer control.

Abstract: Lighting control systems are disclosed, which are configured to detect a rate at which a total current from a current driver is being changed. The total current is an amount of current for a plurality of LED channels comprising a first LED channel and a second LED channel. The systems are also configured to control a first current to the first LED channel and a second current to the second LED channel, the first current and the second current each being a portion of the total current. The controlling comprises: when the rate is detected as being a first slope, changing a ratio of the second current to the first current; and when the rate is detected as being a second slope different from the first slope, keeping the ratio constant while the total current is adjusted according to the dimmer control.

Abstract: A light emitting diode (LED) with a melanopic emission spectrum can comprise a primary light source and a phosphor. The primary light source can comprise an emission spectrum comprising a first peak centered at a wavelength from 480 nm to 500 nm. The phosphor, when excited, can comprise an emission spectrum with a second peak centered at a wavelength from 640 nm to 750 nm, and the intensity of the first peak is greater than the intensity of the second peak. A light emitting apparatus can comprise a first LED with a traditional white light emission spectrum, and a second LED with a melanopic emission spectrum. The light emitted from the apparatus can comprise chromaticity coordinates, in the CIE 1931 color space diagram using the 1964 10° Supplementary Standard Observer, that are within a one-step MacAdam ellipse from the black body locus with chromaticity coordinate x from 0.34 to 0.45.

Abstract: Lighting control systems are disclosed that have a plurality of current sensors and a microprocessor. A first current sensor in the plurality of current sensors measures a first current of a first LED channel, and a second current sensor measures a second current of a second LED channel. The microprocessor is configured to set a setpoint that defines a maximum current for a dimming profile of a lighting fixture, and control a biological light ratio according to the dimming profile. The ratio may be an M/P ratio of melanopic lux to photopic lux or an OPN5/OPN4 ratio of OPN5 lux to melanopic lux. The dimming profile correlates the ratio to a percentage of the maximum current.

Abstract: Lighting apparatuses include an enclosure around first and second light engines. The enclosure has a diffuser over first, second and third regions. The first and second regions are separated by the third region; a first light spectrum is emitted from the first region; a second light spectrum is emitted from the second region; and a mixture of the spectrums is emitted from the third region. In some embodiments, the first spectrum has a CCT?7000K; the second spectrum has a CCT?6500K. In some embodiments, the first spectrum has a first CCT?3500K; the second spectrum has a second CCT?6500K; the second CCT<first CCT and the difference between the CCTs is at least 1000K. In some embodiments, the first spectrum has a color bounded by a first set of chromaticity coordinates, and the second spectrum has a color bounded by a second set.

Abstract: Lighting control systems are disclosed that have a plurality of current sensors and a microprocessor. A first current sensor in the plurality of current sensors measures a first current of a first LED channel, and a second current sensor measures a second current of a second LED channel. The microprocessor is configured to set a setpoint that defines a maximum current for a dimming profile of a lighting fixture, and control a biological light ratio according to the dimming profile. The ratio may be an M/P ratio of melanopic lux to photopic lux or an OPN5/OPN4 ratio of OPN5 lux to melanopic lux. The dimming profile correlates the ratio to a percentage of the maximum current.

Abstract: Embodiments include a lighting device that includes a first illumination source comprising a light-emitting diode (LED) of a first color that generates a first light output with a first melanopic ratio of 0.4 to 1.2, and a second illumination source comprising an LED of a second color that generates a second light output with a second melanopic ratio that is less than the first melanopic ratio. The lighting device also includes a light distribution unit for directing and distributing illumination generated by the first and second illumination sources, where at least one of the first illumination source and the second illumination source is affixed to the light distribution unit, and where the first and second illumination sources are oriented relative to one another such that their respective light outputs are directed in different directions.

Abstract: Luminaries, fixtures, systems and methods of providing both spectrally and spatially targeted illumination are disclosed. Intelligent lighting systems with programmable interfaces for customizing spectral and spatial light output to an individual user are also disclosed. Lighting fixtures including table and floor lamps with adjustable spectral output designed to coordinate with the time of day and human circadian rhythms are described. Adjustable light distribution units that provide for both indirect lighting and task lighting that may be independently varied with respect to color so as to illuminate and facilitate circadian rhythm regulation are also disclosed.

Abstract: Lighting systems and methods for providing biologically optimized illumination throughout the day are disclosed. Systems and methods of providing LED light engines and associated illumination spectrums that are both visually appealing, rich in melanopic flux and that reduce blue light hazard exposure are disclosed. Embodiments of the invention relating to specific spectra of illumination containing high or low amounts of melanopic light, spectrally and spatially tunable LED lighting systems, programmed and automated controllers for temporally controlling bio-effective illumination, and dimming circuitry for tuning the spectral output of lighting devices are also disclosed.

Abstract: A lighting system comprising a light source operable to emit a source light, a sensor operable to sense environmental light from an environment, and a controller operatively connected to each of the sensor and the light source and configured to analyze the environmental light sensed by the sensor to at least one of detect and generate data relating to a condition of the environment, the data being transmittable in a transmitted data light. The sensor is operable to sense the presence or absence of a dominant wavelength associated with the environmental light. Additionally, the controller is operable to correlate the dominant wavelength with a substance, the controller is configured to detect a level of the dominant wavelength correlated with the substance, and the controller is configured to operate the lighting system to generate an alert based upon the detected level of the dominant wavelength.

Abstract: A lighting system comprising a light source operable to emit a source light, a sensor operable to sense environmental light from an environment, and a controller operatively connected to each of the sensor and the light source and configured to analyze the environmental light sensed by the sensor to at least one of detect and generate data relating to a condition of the environment, the data being transmittable in a transmitted data light. The sensor is operable to sense the presence or absence of a dominant wavelength associated with the environmental light. Additionally, the controller is operable to correlate the dominant wavelength with a substance, the controller is configured to detect a level of the dominant wavelength correlated with the substance, and the controller is configured to operate the lighting system to generate an alert based upon the detected level of the dominant wavelength.

Abstract: Lighting control systems are disclosed that have a lighting fixture, a microprocessor, and a single dimmer control that enables a user to adjust a total current to the lighting fixture. The lighting fixture includes a first LED channel that emits a first spectrum comprising white light and a second LED channel that emits a second spectrum comprising biologically-tailored light. The microprocessor is configured to take measurements of current, store a plurality of average values of total current, set a setpoint that defines a maximum current for a dimming profile of the lighting fixture, and control a biological light ratio according to the dimming profile. The ratio may be an M/P ratio of melanopic lux to photopic lux or an OPN5/OPN4 ratio of OPN5 lux to melanopic lux. The dimming profile correlates the ratio to a percentage of the maximum current.