A method of adding a backup power source to a luminaire that includes exposing driver circuitry through a back surface of a housing for a luminaire having a downlight geometry. The housing contains a light engine that is positioned to emit light through a light emission end of the housing. The driver electronics controls power received by the luminaire for powering the light engine. The method may continue with connecting a battery junction box having an electrical pathway opening in reversible engagement to the back surface of the housing by snap fit engagement. The method may further include connecting a backup battery unit to the luminaire by wiring extending from the battery backup unit through the electrical pathway opening in the junction box to the driver electronics for the luminaire.

A lighting circuit turns on multiple semiconductor light sources. Multiple current sources are each coupled in series with a corresponding one from among the semiconductor light sources. A switching converter supplies a driving voltage V.sub.OUT across each of multiple series connection circuits formed of the multiple semiconductor light sources and the multiple current sources. A converter controller controls a switching transistor of the switching converter based on a relation between a voltage across one from among the multiple current sources and a reference voltage having a positive correlation with the temperature T.sub.j.

A lighting circuit turns on multiple semiconductor light sources. Multiple current sources are each coupled in series with a corresponding one from among the semiconductor light sources. A switching converter supplies a driving voltage V.sub.OUT across each of multiple series connection circuits formed of the multiple semiconductor light sources and the multiple current sources. A converter controller controls a switching transistor of the switching converter based on a relation between a voltage across one from among the multiple current sources and a reference voltage having a positive correlation with the temperature T.sub.j.

The inventive concept provides a light treating member for performing a light treatment on a substrate. The light treating member comprises a circuit unit comprising a plurality of LED module units connected in series, each LED module unit comprising a plurality of identical LED modules connected with each other in parallel.

The inventive concept provides a light treating member for performing a light treatment on a substrate. The light treating member comprises a circuit unit comprising a plurality of LED module units connected in series, each LED module unit comprising a plurality of identical LED modules connected with each other in parallel.

A device, system, and method protect circuits of a lighting device. The lighting device includes a current source generating a current and a first load and a second load receiving the current. The lighting device includes an inductor positioned between the current source and the first and second loads that balances the current powering the first and second loads. The lighting device includes a detector monitoring a voltage peak of the first 5 and second loads. The lighting device includes a voltage controller receiving a reading of the voltage peak from the detector and determining when the voltage peak is at least a voltage peak threshold. The voltage controller is configured to adjust a setting for the current generated by the current source based on the reading of the voltage peak.

Disclosed is a plurality of LED packages that are connected in a parallel array. A plurality of parallel arrays can also be connected in series to form a light string. The LED packages present a standardized impedance in which the resistive values of a series resistor and a parallel resistor are selected to moderate the flow of current when the LEDs become either shorted or open circuited.

Disclosed is a plurality of LED packages that are connected in a parallel array. A plurality of parallel arrays can also be connected in series to form a light string. The LED packages present a standardized impedance in which the resistive values of a series resistor and a parallel resistor are selected to moderate the flow of current when the LEDs become either shorted or open circuited.

An LED bulb includes an LED photoelectric module having at least two branches of LED beads with different color temperatures connected in parallel, a control switch connected with one of the branches of LED beads, and an adjustment ring. A total voltage of one branch of LED beads is less than that of each of the other branches of LED beads. The control switch has a ball, the adjustment ring has a magnet, and when the adjustment ring rotates, the magnet draws the ball to roll to switch on or off the control switch. When the control switch is on, the branch of LED beads connected with the control switch is lighted up, and when the control switch is off, the branch of LED beads connected with the control switch is not lighted up.

An LED bulb includes an LED photoelectric module having at least two branches of LED beads with different color temperatures connected in parallel, a control switch connected with one of the branches of LED beads, and an adjustment ring. A total voltage of one branch of LED beads is less than that of each of the other branches of LED beads. The control switch has a ball, the adjustment ring has a magnet, and when the adjustment ring rotates, the magnet draws the ball to roll to switch on or off the control switch. When the control switch is on, the branch of LED beads connected with the control switch is lighted up, and when the control switch is off, the branch of LED beads connected with the control switch is not lighted up.