A light source comprises at least one light-emitting component, in particular a component emitting ultraviolet light and/or a semiconductor component, and a line system, through which a cooling fluid can flow in a flow direction, for controlling the temperature of the at least one light-emitting component, and also a first and a second cooling-fluid pressure sensor, which are arranged one after the other in the line system in the flow direction, and an electronics unit which is connected to the first and second cooling-fluid pressure sensors and configured to determine at least one diagnostic, control and/or regulating value on the basis of pressures captured by the first cooling-fluid pressure sensor and by the second cooling-fluid pressure sensor.

The lighting device includes a power conversion circuit and a control circuit. The power conversion circuit includes a high voltage side output terminal and a low voltage side output terminal to be connected to a light source, and a step-down chopper circuit. The control circuit performs a lighting operation of controlling the power conversion circuit to develop a DC output voltage between the high voltage side output terminal and the low voltage side output terminal. The control circuit starts a protective operation of limiting a current to be supplied to the light source when the output voltage is equal to or higher than a threshold value. The threshold value is in a range of 1.2 to 1.3 times a rated voltage of the light source.

A switchboard management system according to an embodiment of the present disclosure comprises: at least one gateway connected to at least one from among a plurality of circuit breakers in a switchboard panel; and a server connected to the at least one gateway, wherein the at least one gateway comprises an environment sensing unit for acquiring environment data on the at least one circuit breaker connected thereto, and the server receives, from the at least one gateway, driving information on the plurality of circuit breakers and the environment data and predicts the remaining lifespan of each of the plurality of circuit breakers on the basis of the received driving information and environment data.

A switchboard management system according to an embodiment of the present disclosure comprises: at least one gateway connected to at least one from among a plurality of circuit breakers in a switchboard panel; and a server connected to the at least one gateway, wherein the at least one gateway comprises an environment sensing unit for acquiring environment data on the at least one circuit breaker connected thereto, and the server receives, from the at least one gateway, driving information on the plurality of circuit breakers and the environment data and predicts the remaining lifespan of each of the plurality of circuit breakers on the basis of the received driving information and environment data.

An apparatus to drive a multi-channel light emitting diode (LED) array includes switching transistors connected to LED strings of the multi-channel LED array, error amplifiers connected to the switching transistors, each of the error amplifiers being configured to control current flowing through the LED string to have a target magnitude, and overheating protection circuits connected to the switching transistors, each of the overheating protection circuits being configured to regulate current flowing through a respective switching transistor to have a magnitude less than or equal to the target magnitude.

A lamp tube with anti-shock protection and compatible with a plurality of current stable power supply modes is provided. The lamp tube includes a plurality of lighting loads and a control circuit. The control circuit includes an electric shock protection circuit, a filtering and constant current driving circuit, an electronic rectifier circuit and a fast-start inductive rectifier detection and driving circuit.

A fluorescent lamp replacement may include one or more LED drivers and lamps in various embodiments, as well as a shock hazard/pin safety circuit. The present invention provides a fluorescent lamp replacement that, for example, powers an LED and/or OLED and/or QD lamp from a fluorescent fixture, including operating 5 and being powered by electronic ballasts. In some embodiments, a fluorescent lamp replacement includes a number of pins configured to electrically connect to a fluorescent lamp fixture, at least one non-fluorescent light source, a transistor between at least one of the pins and the at least one non-fluorescent light source, and a shock hazard protection circuit configured to disable the transistor to limit current flowing through at least some of the pins.

The present invention provides a lighting system comprising a main power source, a light source driver electrically coupled to the main power source, and a light source unit driven by the light source driver. The light source driver is encased within a dedicated or independent driver housing. The light source driver and the driver housing are physically and electrically connected to the light source unit via a flexible cord. The length of the flexible cord is so configured that the light source unit can be installed at different locations inside a building without moving the light source driver around.

LED lighting systems and methods for retro-fitting existing lighting systems such as acorn and other globe style fixtures is disclosed. The retro-fit systems can be provided with an LED driver, an adaptor casting which mounts to industry standard fixture, a riser for adjusting the height of the lighting fixture, and an assembly of an optically active sealing lens, a heat sink and a LED board, wherein the LED lights, which can be made up of a plurality of LEDs, are arranged in concentric rings on the LED board, and are fitted with a sealing lens in the form of a rotated bubble optic with concentric grooves on the inner surface.

An embodiment provides a lamp apparatus, including: at least one filament; an amount of amalgam; a heat-sink assembly connected to the lamp apparatus; and at least one control circuit comprising a heating element and a temperature measurement element connected to the at least one filament, wherein the control circuit varies the electrical power delivered to the heating element, thereby controlling an internal temperature of the lamp apparatus relative to a temperature set point. Other aspects are described and claimed.