A controlling of a lighting network based on traffic monitoring comprises steps of determining plurality of coverage areas of set of luminaires, where each luminaire comprises at least one light source. Information related to a presence of users in said coverage areas is received. This may relate both outdoor or indoor areas and activity. A status of at least certain luminaire is then changed to a reserve status, when a last detected user exits the coverage area. Each coverage area or luminaire is providing with an expected value for the time of when the next user is expected to arrive in the coverage area of said luminaire, A set of luminaires [R] of said luminaires with the reserve status to be controlled, such as dimmed, is then defined and information related to demand response requests [D.sub.1, . . . , D.sub.n] of an electric power grid is received. In addition controlling, such as dimming, at least one of said defined set of luminaires in said reserve is performed in order to fulfil said demand response requests at least partially.

A lighting system comprises an excitor which drives at least one reactor. The reactor is an under-damped resonant circuit that includes a network of lighting elements in a reactive string and reactive components distributed among the lighting elements. These reactive components can regulate individual lighting elements. The lighting elements emit an AC luminous waveform which comprises a first phase and a second phase. Selected lighting elements can be modulated by a datastream. The modulated light moves through free-space to a receiving device.

An indicator circuit (10) includes a first light emission device (R1 and D1) configured to be driven by a first voltage (Von) to emit light; a second light emission device (R2 and D2) configured to be driven by a second voltage (Vstb) to emit light; and a control device (Q1, D3 and R3) configured to be driven by the first voltage (Von) and the second voltage (Vstb) to allow the first light emission device (R1 and D1) to be driven when the first voltage (Von) is active but the second voltage (Vstb) is not active and not to allow the first light emission device (R1 and D1) to be driven when the first voltage (Von) and the second voltage (Vstb) are active.

A control circuit for generating a switching control signal to control switching operations of a power switch in a power stage circuit, can include: a first control loop configured to receive a first voltage feedback signal, and to generate a first compensation signal; a voltage regulating circuit configured to receive an output voltage signal of the power stage circuit, and to generate a second compensation signal according to a difference between an output voltage signal of the power stage circuit during different time periods; and control and driving circuit configured to receive the first and second compensation signals and a sense voltage signal that represents a current through an inductor of the power stage circuit, and to generate an OFF signal, and a switching control signal according to the OFF signal and an ON signal.

Embodiments of the present disclosure disclose an illuminating device, a control method thereof and a control system thereof, which can precisely adjust the color of irradiating light according to the color of an object. In the embodiment of the present disclosure, a next detection light is obtained according to reflected light of a previous detection light. When the color difference of reflected light of the previous detection light and the next detection light is less than a preset color difference range, the illuminating device is controlled to project the next detection light to an illuminated object.

Embodiments of the present disclosure disclose an illuminating device, a control method thereof and a control system thereof, which can acquire the color of an illuminated object and adjust irradiating light emitted by the illuminating device according to the color of the object. The control method includes switching on the illuminating device to project initial detection light to an illuminated object, acquiring initial reflected light of the illuminated object, obtaining an initial color of the illuminated object according to the initial reflected light, switching off the illuminating device projecting the initial detection light to the illuminated object, acquiring an environment color of an environment provided with the illuminating device, correcting the initial color according to the environment color to obtain a corrected color, acquiring target irradiating light according to the corrected color, and controlling the illuminating device to project the target irradiating light to the illuminated object.

The present disclosure discloses a smart lighting system and a control method for the smart lighting system. The smart lighting system includes: an environment acquisition module being configured to acquire environment information and at least one lighting module, and where the environment acquisition module includes: a color detection unit configured to acquire color information in an environment; an auxiliary detection unit configured to acquire auxiliary information in the environment, wherein the environment information is determined by using the color information and/or the auxiliary information; an operational unit and a control unit configured to determine a control signal according to the environment information; and where the at least one lighting module includes: a driving unit configured to determine a driving signal according to the control signal; and at least one light source configured to receive the driving signal and emit light according to the driving signal.

A light source module includes a wiring board and a LED array electrically connected to the wiring board. The LED array can be driven to emit a first group of emission peaks in 300 nm≦λ.sub.max<450 nm, a second group of emission peaks in 450 nm≦λ.sub.max<550 nm, and a third group of emission peaks in 550 nm for matching the spectrum of sunlight underwater. When the maximum peak intensity of the emission peaks in the second group is taken as 1.0, the peak intensity I.sub.a of each emission peak in the first group is in a range of 0<I.sub.a≦0.9, and the peak intensity I.sub.b of each emission peak in the third group is in a range of 0<I.sub.b≦0.9. Accordingly, the light source module is suitable for aquatic species and can enhance growing rate of the aquatic species.

The present disclosure generally relates to the field of fire alarms. The teachings thereof may be embodied in a strobe notification appliance having: a boost circuit connected to an input voltage; an energy storage circuit charged by the boost circuit; a drive circuit generating a drive current; an LED circuit with at least one LED element; a first sampling circuit collecting an overall voltage drop of all the LED elements; and a control circuit configured to adjust the drive circuit to supply a working current during an alarming stage and supply a detection current during a detection stage. The detection current is lower than the working current and thereby light energy produced by the LED elements during the detection stage is lower than alarming light energy produced during the alarming stage. During the detection stage, the control circuit determines whether the LED circuit works normally based on the collected overall voltage drop.

A wireless communication device includes: a wired communication circuit which receives, through a wired connection, an operation signal for controlling each of luminaires from a management device which controls an operation of each of the luminaires; a radio communication circuit which converts the operation signal received by the wired communication circuit and transmits the converted operation signal to each of the luminaires over a radio wave; an infrared ray receiver which receives an infrared ray signal transmitted from outside; and a controller. When the wired communication circuit receives a signal having a predetermined pattern from the management device, the controller transitions to a state for receiving the infrared ray signal, and, based on the infrared ray signal transmitted from outside, transmits a signal relating to communication setting between the radio communication circuit and each of the luminaires to each of the plurality of luminaires via the radio communication circuit.