Abstract: Disclosed herein are lighting apparatuses that have a centered light source and at least one off-center light source. According to certain embodiments, a lighting apparatus includes a first light fixture having a first light source arranged at a first position that is centered with respect to a first optical axis of a first optic, and a second light source arranged at a second position that is off-center with respect to the first optical axis of the first optic. The first optic is configured to receive light emitted by the first light source and the second light source.

Abstract: Disclosed herein are lighting apparatuses that have a centered light source and at least one off-center light source. According to certain embodiments, a lighting apparatus includes a first light fixture having a first light source arranged at a first position that is centered with respect to a first optical axis of a first optic, and a second light source arranged at a second position that is off-center with respect to the first optical axis of the first optic. The first optic is configured to receive light emitted by the first light source and the second light source.

Abstract: Certain aspects involve a lighting fixture including multiple de-saturated color LED groups and in which the color temperature and intensity of the generated light can be selectively modified. The lighting fixture is driven by a multi-channel driver that independently controls the multiple de-saturated color LED groups. In one example, the de-saturated color LED groups are made with the same Indium gallium nitride (InGaN) LED, as to maintain all electrical/thermal characteristics. The color temperature and intensity of the lighting fixture are adjusted by managing the intensity of each of the de-saturated color LED groups according to a lookup table or a formula describing the relationship between the intensities of the de-saturated color LED groups and the color temperature and intensity of the lighting fixture. Because de-saturated color LEDs are used in the lighting fixture, dynamic dimming or “warm dim” can be achieved to replicate the effect of an incandescent lamp.

Abstract: Certain aspects involve a lighting fixture including multiple de-saturated color LED groups and in which the color temperature and intensity of the generated light can be selectively modified. The lighting fixture is driven by a multi-channel driver that independently controls the multiple de-saturated color LED groups. In one example, the de-saturated color LED groups are made with the same Indium gallium nitride (InGaN) LED, as to maintain all electrical/thermal characteristics. The color temperature and intensity of the lighting fixture are adjusted by managing the intensity of each of the de-saturated color LED groups according to a lookup table or a formula describing the relationship between the intensities of the de-saturated color LED groups and the color temperature and intensity of the lighting fixture. Because de-saturated color LEDs are used in the lighting fixture, dynamic dimming or “warm dim” can be achieved to replicate the effect of an incandescent lamp.

Abstract: An analog-based dimmable LED lighting system includes a plurality of LED lighting modules, which emit light at different correlated color temperature (CCT) ranges. Each of the LED lighting modules is powered by a common dimming signal in the form of an AC voltage which corresponds to a dimming level in a dimming region. Each of the LED lighting modules includes an LED, an analog rectifier bridge to convert the AC voltage of the common dimming signal to a DC voltage, and an analog current limiter connected between the rectifier and the LED to control current through the LED according to the common dimming signal. The LED(s) in the different lighting modules are controlled, via respective analog current limiter, to produce a resultant light at a selected CCT and light intensity according to the common dimming signal.

Abstract: A monitoring system is configured to manage lumen depreciation in a lighting fixture and includes an optic housing, a light source with a light-emitting diode (LED), a processor, and a memory device. The memory device stores instructions that cause the monitoring system to measure elapsed time during which the LED light source emits the light and, based on the elapsed time, determine a current level of the emitted light. In response to the current level changing from an acceptable level to an unacceptable level, an alert is provided to show that the emitted light has reached the unacceptable level. A reset input is received to remove the alert for a predetermined period of time. Changes in status of the LED light source are indicated.

Abstract: An analog-based dimmable LED lighting system includes a plurality of LED lighting modules, which emit light at different correlated color temperature (CCT) ranges. Each of the LED lighting modules is powered by a common dimming signal in the form of an AC voltage which corresponds to a dimming level in a dimming region. Each of the LED lighting modules includes an LED, an analog rectifier bridge to convert the AC voltage of the common dimming signal to a DC voltage, and an analog current limiter connected between the rectifier and the LED to control current through the LED according to the common dimming signal. The LED(s) in the different lighting modules are controlled, via respective analog current limiter, to produce a resultant light at a selected CCT and light intensity according to the common dimming signal.

Abstract: Electronic circuitry for color-mixing in an LED light fixture during AC power dimming is disclosed to achieve adjustable color temperature. According to one embodiment, a dimmable LED light fixture has first, second, and third LED light sources, the first and second LED light sources producing white light, the third LED light source producing colored light, the LED driver configured to power the LED light sources by providing a single-channel variable-DC current source having two output terminals, and a current regulator for maintaining the current in the third LED light source path substantially constant as the LED driver output current is decreased when the AC power is reduced by the dimmer module, thereby altering the color of the light produced by the combination of the LED light sources.

Abstract: A monitoring system is configured to manage lumen depreciation in a lighting fixture and includes an optic housing, a light source with a light-emitting diode (LED), a processor, and a memory device. The memory device stores instructions that cause the monitoring system to measure elapsed time during which the LED light source emits the light and, based on the elapsed time, determine a current level of the emitted light. In response to the current level changing from an acceptable level to an unacceptable level, an alert is provided to show that the emitted light has reached the unacceptable level. A reset input is received to remove the alert for a predetermined period of time. Changes in status of the LED light source are indicated.

Abstract: Electronic circuitry for color-mixing in an LED light fixture during AC power dimming is disclosed to achieve adjustable color temperature. According to one embodiment, a dimmable LED light fixture has first, second, and third LED light sources, the first and second LED light sources producing white light, the third LED light source producing colored light, the LED driver configured to power the LED light sources by providing a single-channel variable-DC current source having two output terminals, and a current regulator for maintaining the current in the third LED light source path substantially constant as the LED driver output current is decreased when the AC power is reduced by the dimmer module, thereby altering the color of the light produced by the combination of the LED light sources.