Exemplary embodiments of the present disclosure are directed to a lighting system that includes a line control module and light modules. The line control module can be configured to interrupt power to the light modules according to one or more power interruption schemes to control an operation of the light modules. The line control module can have user interface circuitry including a rotary encoder with a shaft and a push button, a preview circuit, and indicator light emitting diodes. A user can interact with the lighting system via the user interface circuitry, which can be configured to provide visual feedback of various settings of the lighting system.

Disclosed herein are systems and methods using power line communication to control light fixtures. The system operates in two phases. In the first phase, a control device generates commands which are encoded on a control signal. The control signal is generated by encoding data using two sinusoidal waves, the second sinusoidal wave being a phase-shifted copy of the first sinusoidal wave. The resulting control signal is sent on a power line. The control signal is received by light fixtures and/or sensors through an ultra-narrow band filter, decoded and converted to executable instructions for the light fixtures and data parameters for sensors. In the second phase, the light fixtures are jointly controlled by the control device and the sensors. The control in phase two is hybrid open loop/closed loop control.

Disclosed herein are systems and methods using power line communication to control light fixtures. The system operates in two phases. In the first phase, a control device generates commands which are encoded on a control signal. The control signal is generated by encoding data using two sinusoidal waves, the second sinusoidal wave being a phase-shifted copy of the first sinusoidal wave. The resulting control signal is sent on a power line. The control signal is received by light fixtures and/or sensors through an ultra-narrow band filter, decoded and converted to executable instructions for the light fixtures and data parameters for sensors. In the second phase, the light fixtures are jointly controlled by the control device and the sensors. The control in phase two is hybrid open loop/closed loop control.

A method and system for controlling electrical devices, such as lights capable of emitting different colours or colour sequences (shows). A multi-field command protocol is proposed to transmit command messages from a line controller to a controllable electrical device (light) to control its mode of operation, and optionally at least one dimension associated with the mode (e.g. light colour, and brightness and/or colour saturation, or blending colour show and speed of changing colours). The protocol comprises brief interruptions to the power supplied to the electrical device comprising a first variable length OFF time, a variable length ON time following the first OFF time, and a second variable length OFF time following the ON time. Together these times form three information fields having values represented by their respective lengths/durations. The fields define a selected mode of operation of the electrical device, and optionally at least one dimension associated with the mode.

A method and system for controlling electrical devices, such as lights capable of emitting different colours or colour sequences (shows). A multi-field command protocol is proposed to transmit command messages from a line controller to a controllable electrical device (light) to control its mode of operation, and optionally at least one dimension associated with the mode (e.g. light colour, and brightness and/or colour saturation, or blending colour show and speed of changing colours). The protocol comprises brief interruptions to the power supplied to the electrical device comprising a first variable length OFF time, a variable length ON time following the first OFF time, and a second variable length OFF time following the ON time. Together these times form three information fields having values represented by their respective lengths/durations. The fields define a selected mode of operation of the electrical device, and optionally at least one dimension associated with the mode.

A controller comprises a controllably conductive device adapted to be coupled in series electrical connection between an AC power source and a load control device. The controller also comprises a control circuit coupled to the controllably conductive device for rendering the controllably conductive device conductive each half-cycle of the AC power source to generate a phase-control voltage. The control circuit is operable to render the controllably conductive device conductive for a portion of each half-cycle of the AC power source. The control circuit is operable to transmit a digital message to the load control device for controlling the power delivered to the load by encoding digital information in timing edges of the phase-control voltage, where the phase-control voltage having at least one timing edge in each half-cycle of the AC power source when the control circuit is transmitting the digital message to the load control device.

A controller comprises a controllably conductive device adapted to be coupled in series electrical connection between an AC power source and a load control device. The controller also comprises a control circuit coupled to the controllably conductive device for rendering the controllably conductive device conductive each half-cycle of the AC power source to generate a phase-control voltage. The control circuit is operable to render the controllably conductive device conductive for a portion of each half-cycle of the AC power source. The control circuit is operable to transmit a digital message to the load control device for controlling the power delivered to the load by encoding digital information in timing edges of the phase-control voltage, where the phase-control voltage having at least one timing edge in each half-cycle of the AC power source when the control circuit is transmitting the digital message to the load control device.

A lighting system having a main direct current (DC) voltage source and controllable lighting fixtures that each have a DC-DC current source. Each lighting fixture includes a DC voltage to current converter and an LED light source, and the DC voltage to current converter outputs a constant current from the DC voltage provided by a AC-to-DC converter. The output current of the DC voltage to current converter is independent of the total number of lighting fixtures in the lighting system and is controlled by injecting control commands to the DC voltage provided to DC-DC current source, wherein the AC power provided to the AC-to-DC converter is turned on and off to turn on and off the lights provided by the lighting fixtures of the lighting system and dimming and/or other lighting controls by injecting control commands into the DC voltage provided to the DC-DC current source.

A two-way load control system comprises a power device, such as a load control device for controlling an electrical load receiving power from an AC power source, and a controller adapted to be coupled in series between the source and the power device. The load control system may be installed without requiring any additional wires to be run, and is easily configured without the need for a computer or an advanced commissioning procedure. The power device receives both power and communication over two wires. The controller generates a phase-control voltage and transmits a forward digital message to the power device by encoding digital information in timing edges of the phase-control voltage. The power device transmits a reverse digital message to the controller via the power wiring.

A two-way load control system comprises a power device, such as a load control device for controlling an electrical load receiving power from an AC power source, and a controller adapted to be coupled in series between the source and the power device. The load control system may be installed without requiring any additional wires to be run, and is easily configured without the need for a computer or an advanced commissioning procedure. The power device receives both power and communication over two wires. The controller generates a phase-control voltage and transmits a forward digital message to the power device by encoding digital information in timing edges of the phase-control voltage. The power device transmits a reverse digital message to the controller via the power wiring.