A lighting system is disclosed. An example lighting system includes at least one light emitting diode (“LED”) circuit having a plurality of LEDs, where the plurality of LEDs includes the same or differently colored LEDs. The lighting system also includes a driver including at least one bridge rectifier and at least one capacitor, a housing including a heat sinking material, and at least two connectors. One of the at least two connectors is adaptable to be connected to the driver and another one of the at least two connectors is adaptable to be connected to an AC power source. The driver is configured to receive an AC voltage from the AC power source and provide a voltage and a current to the at least one LED circuit. Additionally, the driver and the at least one LED circuit are mounted to the housing.

A decorative light string is provided that includes a plurality of light emitting diode (LED) illumination assemblies electrically connected in series and a stabilizing current or voltage circuit. Each of the plurality of LED illumination assemblies includes an LED. The stabilizing current or voltage circuit is electrically connected in series with the plurality of LED illumination assemblies. The stabilizing current or voltage circuit is configured to receive input power from an input power source and configured to supply a stabilized current or voltage to the plurality of LED illumination assemblies that provides a stable supply even with input power source fluctuations. Power fluctuations from an input power source can prevent the decorative light string from maintaining a desired brightness and desired LED life unless the voltage or current to the LED illumination assemblies is stabilized.

A decorative light string is provided that includes a plurality of light emitting diode (LED) illumination assemblies electrically connected in series and a stabilizing current or voltage circuit. Each of the plurality of LED illumination assemblies includes an LED. The stabilizing current or voltage circuit is electrically connected in series with the plurality of LED illumination assemblies. The stabilizing current or voltage circuit is configured to receive input power from an input power source and configured to supply a stabilized current or voltage to the plurality of LED illumination assemblies that provides a stable supply even with input power source fluctuations. Power fluctuations from an input power source can prevent the decorative light string from maintaining a desired brightness and desired LED life unless the voltage or current to the LED illumination assemblies is stabilized.

A lighting system includes an LED downlight mountable to a ceiling, a driver, and an insulation displacement connector (IDC). Light from the downlight can be faced downward to project light or upward to reflect light off of the ceiling. The driver has an input with a first voltage and an output with a second voltage, the second voltage being lower than the first and being provided through a wire system extending from the LED driver. The IDC connects the downlight to the wire system. The lighting system can be changed from a first to a second configuration by at least one of adding an additional downlight using a corresponding MC or removing an existing downlight using a corresponding IDC. The second configuration does not significantly affect a desired output range of light from any downlight or any LED circuit of any downlight that remains or preexists from the first configuration.

A lighting system includes an LED downlight mountable to a ceiling, a driver, and an insulation displacement connector (IDC). Light from the downlight can be faced downward to project light or upward to reflect light off of the ceiling. The driver has an input with a first voltage and an output with a second voltage, the second voltage being lower than the first and being provided through a wire system extending from the LED driver. The IDC connects the downlight to the wire system. The lighting system can be changed from a first to a second configuration by at least one of adding an additional downlight using a corresponding MC or removing an existing downlight using a corresponding IDC. The second configuration does not significantly affect a desired output range of light from any downlight or any LED circuit of any downlight that remains or preexists from the first configuration.

A light regulating apparatus includes a converter, a load circuit, and a controller. The converter is configured to output a load current signal according to a controlling signal. The load circuit is driven by the load current signal. The controller is configured to generate the control signal. The controller includes an error calculation unit, a regulation unit, a feed forward compensation unit, and an addition unit. The error calculation unit is configured to generate a first error signal according to a reference current signal and a feedback signal. The regulation unit is configured to generate a regulating signal according to the error signal. The feed forward compensation unit is configured to generate a feed forward compensation signal according to the reference current signal. The addition unit is configured to generate the control signal according to the regulation signal and the feed forward compensation signal.

A single chip multi-voltage or multi-brightness LED lighting device having at least two LED circuits. Each of the at least two LED circuits having at least two LEDs connected together in series. Each of the at least two LED circuits are electrically unconnected to each other in a parallel relationship, have a forward operating drive voltage of at least six volts and are monolithically integrated on a single substrate. A method of manufacturing a single chip with two or more LED circuits configurable by means of connecting the circuits so as to provide optional operating voltage level and/or desired brightness level wherein the electrical connection may be achieved and/or completed at the LED packaging level when the single chips are integrated into the LED package. Alternatively, the LED package may have external electrical contacts that match the integrated chips within. Optionally allowable, the drive voltage level and/or the brightness level select-ability may be passed on through to the exterior of the LED package and may be selected by the LED package user, the PCB assembly facility, or the end product manufacturer.

An LED device for use with an AC voltage power source configured such that at least one LED emits light during a positive phase of power provided from an AC power supply and at least one LED emits light during the negative phase of power provided from an AC power supply. The LED device includes a first power connection lead and a second power connection lead, both leads capable of being connected to and receiving power from an AC power supply.

A decorative light string is provided that includes a plurality of light emitting diode (LED) illumination assemblies electrically connected in series and a stabilizing current or voltage circuit. Each of the plurality of LED illumination assemblies includes an LED. The stabilizing current or voltage circuit is electrically connected in series with the plurality of LED illumination assemblies. The stabilizing current or voltage circuit is configured to receive input power from an input power source and configured to supply a stabilized current or voltage to the plurality of LED illumination assemblies that provides a stable supply even with input power source fluctuations. Power fluctuations from an input power source can prevent the decorative light string from maintaining a desired brightness and desired LED life unless the voltage or current to the LED illumination assemblies is stabilized.

A decorative light string is provided that includes a plurality of light emitting diode (LED) illumination assemblies electrically connected in series and a stabilizing current or voltage circuit. Each of the plurality of LED illumination assemblies includes an LED. The stabilizing current or voltage circuit is electrically connected in series with the plurality of LED illumination assemblies. The stabilizing current or voltage circuit is configured to receive input power from an input power source and configured to supply a stabilized current or voltage to the plurality of LED illumination assemblies that provides a stable supply even with input power source fluctuations. Power fluctuations from an input power source can prevent the decorative light string from maintaining a desired brightness and desired LED life unless the voltage or current to the LED illumination assemblies is stabilized.