The disclosure is a connectivity APP loaded in a mobile phone for configuring a linkable security lighting system comprising a plurality of LED security lights installed outdoors, wherein by operating the connectivity APP the plurality of LED security lights are divided into N groups of member security lights to be linked. Each group of member security lights is assigned a group code to be applied to each member security light in the group such that within the group the member security lights are interlinked wirelessly via wireless signals prefixed with the same group code, wherein when a member security light is initiated by a sensing signal for operating an illumination mode, the member security light being initiated acts as a commander to transmit an instruction signal to activate all member security lights belonging to the same group code to synchronously operate the illumination mode.

A load control device for controlling the power delivered from an AC power source to an electrical load includes a thyristor, a gate coupling circuit for conducting a gate current through a gate of the thyristor, and a control circuit for controlling the gate coupling circuit to conduct the gate current through a first current path to render the thyristor conductive at a firing time during a half cycle. The gate coupling circuit is able to conduct the gate current through the first current path again after the firing time, but the gate current is not able to be conducted through the gate from a transition time before the end of the half-cycle until approximately the end of the half-cycle. The load current is able to be conducted through a second current path to the electrical load after the transition time until approximately the end of the half-cycle.

A load control device for controlling power delivered from an AC power source to an electrical load may comprise a thyristor, a gate current path, and a control circuit. The control circuit may be configured to control the gate current path to conduct a pulse of gate current through a gate terminal of the thyristor to render the thyristor conductive at a firing time during a half-cycle of the AC power source. The control circuit may operate in a first gate drive mode in which the control circuit renders the gate current path non-conductive after a pulse time period from the firing time. The control circuit may operate in a second gate drive mode in which the control circuit maintains the gate current path conductive after the pulse time period during the half-cycle.

The present disclosure discloses a controller based on APP control, disposed between a power source and a lamp strip. The controller comprises: a receiving control unit electrically connected to the power source for receiving a Bluetooth signal or a WIFI signal transmitted by an external smart terminal, and issuing a control signal according to the Bluetooth signal or the WIFI signal; a driving unit electrically connected to the receiving control unit for adjusting a flicker color and a flicker frequency of the lamp strip according to the control signal; and a manual control unit electrically connected to the receiving control unit for inputting a manual signal to the receiving control unit to cause the driving unit to switch the lamp strip to different modes.

A load control device for controlling power delivered from an alternating-current power source to an electrical load may comprise a controllably conductive device, a control circuit, and an overcurrent protection circuit that is configured to be disabled when the controllably conductive device is non-conductive. The control circuit may be configured to control the controllably conductive device to be non-conductive at the beginning of each half-cycle of the AC power source and to render the controllably conductive device conductive at a firing time during each half-cycle (e.g., using a forward phase-control dimming technique). The overcurrent protection circuit may be configured to render the controllably conductive device non-conductive in the event of an overcurrent condition in the controllably conductive device. The overcurrent protection circuit may be disabled when the controllably conductive device is non-conductive and enabled after the firing time when the controllably conductive device is rendered conductive during each half-cycle.

A dimmer structured to be connected to a power source via a hot conductor and to a load via a load conductor includes a zero-crossing detector structured to generate a zero-crossing signal that that has a high state or a low state and changes states in response to a voltage between the hot conductor and the load conductor reaching or leaving zero volts only during a positive half-cycle of power received from the power source, a processing unit structured to receive the zero-crossing signal and to generate a triac control signal based on the zero-crossing signal, and a triac control unit including a triac and being structured to electrically connect between the hot conductor and the neutral conductor and to turn on and turn off the triac based on the triac control signal.

A dimmer switch system for dimming a load includes a master dimmer structured to be electrically connected to a power source and the load and to control dimming of the load by regulating power provided from the power source to the load, and at least one accessory dimmer structured to be electrically connected to the master dimmer via a traveler conductor. The master dimmer is structured to generate a first control signal on the traveler conductor during one of a positive or negative half-cycle of power from the power source. The at least one accessory dimmer is structured to generate a second control signal on the traveler conductor during the other of the positive or negative half-cycle of power from the power source.

A single-input and single-output touch phase-cut dimming controller includes an AC input terminal, a dimming output terminal, voltage dependent resistors, rectifiers, diodes, Insulated Gate Bipolar Transistors (IGBT), resistors, a sampling circuit, a power supply circuit, a driver circuit, a single-chip microcomputer processor, a touch circuit, an over-current protection circuit, and a brightness regulator. The components on each circuit unit are correspondingly connected to and adapt to each other according to the functional requirements of the circuit design. The controller allows full current to be delivered to the control circuit while lowering overall power consumption and improving convenience and compatibility. The new touch dimmer is not limited to mechanical endurance, and has functions such as soft start, over-current protection and current-limiting protection.

A method of configuring an LED light with a tunable diffused light color temperature is disclosed. The method comprises using a light-emitting unit configured with a first LED load emitting light with a low color temperature and a second LED load emitting light with a high color temperature electrically connected in parallel, using a light diffuser to cover the first LED load and the second LED load to create a diffused light with a diffused light color temperature, using two semiconductor switching devices working in conjunction with a controller to respectively control a first electric power delivered to the first LED load and a second electric power delivered to the second LED load to operate a color temperature tuning and switching scheme and using a first external control device to output at least one first external control signal to activate a selection of a diffused light color temperature.

A technology for configuring a lifestyle LED light with a tunable light color temperature is disclosed. The technology of tuning the light color temperature is made possible by blending two LED loads emitting light with different color temperatures thru a light diffuser with an arrangement that a first electric power delivered to a first LED load emitting light with a low color temperature and a second electric power delivered to a second LED load emitting light with a high color temperature are reversely and complementarily adjusted for tuning a diffused light color temperature such that a total light intensity generated by the LED light is kept essentially unchanged.