A system of assessing performance of a photocuring light source includes a photocuring light source unit, a light source control unit, a sensing unit, and a computer unit. The light source unit produces light rays on a work platform of a printing machine. The light source control unit is electrically coupled to and controls the light source unit. The sensing unit is disposed proximally to the light source unit to detect power of the light rays from the light source unit. The computer unit is electrically coupled to the sensing unit and the light source control unit to control the light source unit and record the power of the light rays and operating period of the light source unit. A combination having the system is also disclosed.

An emergency lighting device includes a housing, a light emitter positioned in the housing, a control circuit positioned in the housing and operatively connected to the light emitter, an indicator light positioned in the housing, and a fault indicator circuit positioned in the housing and operatively connected to the indicator light. The fault indicator circuit is configured to monitor the light emitter, analyze activation of the light emitter, and activate the indicator light based on the analysis of the activation of the light emitter.

An emergency lighting device includes a housing, a light emitter positioned in the housing, a control circuit positioned in the housing and operatively connected to the light emitter, an indicator light positioned in the housing, and a fault indicator circuit positioned in the housing and operatively connected to the indicator light. The fault indicator circuit is configured to monitor the light emitter, analyze activation of the light emitter, and activate the indicator light based on the analysis of the activation of the light emitter.

Aspects of the present invention further include a lighting system comprising a lighting source, a connector in electrical communication with the lighting source and an external power source, an energy storage device, an input device, and a controller. The controller may be configured to identify the presence of a load indicator signal received via the input device, determine whether the load indicator signal indicates a load-reducing state, and when the load indicator signal indicates the load-reducing state, discharge the energy storage device to maintain an intensity of the lighting source.

The invention relates to a luminaire comprising a housing comprising an electrically nonconductive portion; a light source arranged in the housing; a light drive and control assembly and configured for driving said light source; a communication assembly arranged in the housing.

The invention relates to a luminaire comprising a housing comprising an electrically nonconductive portion; a light source arranged in the housing; a light drive and control assembly and configured for driving said light source; a communication assembly arranged in the housing.

System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current generator configured to generate a first current flowing through one or more light emitting diodes. The one or more light emitting diodes are configured to receive a rectified voltage generated by a rectifying bridge coupled to a TRIAC dimmer. Additionally, the system includes a bleeder configured to receive the rectified voltage, and a controller configured to receive a sensing voltage from the current generator and output a control signal to the bleeder. The sensing voltage indicates a magnitude of the first current.

Provided is an electrical connector (10) comprising supply side and load side housings (12) and (30 that are connectable by means of female socket (22) and male plug (32). The connector (10) includes an AC input (14) with input protection (18) for receiving an AC supply (16), a primary rectifier arrangement (20) configured to rectify the AC input (14) to a DC input, a female socket (22) having a single layer air-cored supply coil (24) sealed within the socket (22), and a capacitor arranged in series with the supply coil (24) to form a series resonant LC arrangement (26). Also included is a half-bridge resonant converter switched mode power supply arrangement (28) supplied from the DC input and driving the supply coil (24) to produce a symmetrical AC waveform, said converter configured with a switching frequency substantially matched to a resonant frequency of the series resonant LC arrangement. Power is transferrable to load coil (34) sealed within male plug (32), which includes a secondary rectifier arrangement (36) configured to rectify an AC waveform induced within the load coil (34) to produce a DC output for supply to a load (40).

Provided is an electrical connector (10) comprising supply side and load side housings (12) and (30 that are connectable by means of female socket (22) and male plug (32). The connector (10) includes an AC input (14) with input protection (18) for receiving an AC supply (16), a primary rectifier arrangement (20) configured to rectify the AC input (14) to a DC input, a female socket (22) having a single layer air-cored supply coil (24) sealed within the socket (22), and a capacitor arranged in series with the supply coil (24) to form a series resonant LC arrangement (26). Also included is a half-bridge resonant converter switched mode power supply arrangement (28) supplied from the DC input and driving the supply coil (24) to produce a symmetrical AC waveform, said converter configured with a switching frequency substantially matched to a resonant frequency of the series resonant LC arrangement. Power is transferrable to load coil (34) sealed within male plug (32), which includes a secondary rectifier arrangement (36) configured to rectify an AC waveform induced within the load coil (34) to produce a DC output for supply to a load (40).

A light source driving device performs a switching control on a third switch of a second control unit by using a control signal of a fourth control unit (overvoltage protection circuit), so as to allow the third switch to be turned on by the control signal of the fourth control unit only in a partial section in which an overvoltage occurs, and then turns off the third switch, thereby quickly releasing the blocking of light emission from the light source so as to be capable of returning to a light emitting state.