Abstract: The invention relates to a modular LED lighting unit, comprising a first module (1) to which an AC supply voltage (9) can be supplied and which comprises: a second sub-module (B), at the output of which a DC supply voltage (5) is provided which is galvanically isolated from the AC supply voltage (9), and a control unit (G), further comprising a second module (2) which comprises a further sub-module (C) supplied with the DC supply voltage (5) of the first module (1), in particular a pulsed constant current source, which is controlled by a control unit (E) of the second module (2), an LED module (F) which has at least one LED range (8) and is supplied by the further sub-module (C), inn particular a constant current source, and an emergency light operating circuit which is connected to a rechargeable energy store (ES); and takes over powering the modular LED lighting unit in the event of failure of the AC supply voltage (9).

Abstract: A power supply system for illuminating an LED lamp unit, having a normal mode of operation in which a mains input of a driver of the LED lamp unit is supplied by mains power, and an emergency mode of operation, in which the LED lamp unit is supplied by a charge storage device, is disclosed. The system includes an emergency mode converter operable to step-up the voltage from the charge storage device and to supply the mains driver input for illuminating the LED lamp unit.

Abstract: An emergency lighting device for controlling a lighting means includes an energy store, such as a battery or an accumulator, a charging circuit for the energy store having connections for an AC voltage (alternating voltage), the charging circuit has a potential isolation element, a potentially isolated clocked converter supplied from the energy store and having a switch, preferably a flyback converter. The converter can be supplied only by the energy store, a control circuit for controlling the switch, and a supply path from the secondary side of the converter to connections for the lighting means.

Abstract: A power supply system for illuminating an LED lamp unit, having a normal mode of operation in which a mains input of a driver of the LED lamp unit is supplied by mains power, and an emergency mode of operation, in which the LED lamp unit is supplied by a charge storage device, is disclosed. The system includes an emergency mode converter operable to step-up the voltage from the charge storage device and to supply the mains driver input for illuminating the LED lamp unit.

Abstract: The invention relates to an emergency lighting device for controlling a lighting means, comprising an energy store, such as a battery or an accumulator, a charging circuit for the energy store having connections for an AC voltage (alternating voltage), wherein the charging circuit has a potential isolation element, a potentially isolated clocked converter supplied from the energy store and having a switch, preferably a flyback converter, wherein the converter preferably can be supplied only by the energy store, a control circuit for controlling the switch, and a supply path from the secondary side of the converter to connections for the lighting means.

Abstract: A power supply system supplies gas discharge lamp unit (5) arc power and cathode power. The system includes an emergency driver (17) for receiving power from a power supply (15). The driver provides the lamp arc power and the cathode power. The driver adjusts the total power provided to the lamp unit and varies the proportion of the total power provided as the arc power and as the cathode power in order to provide optimised arc power and cathode power according to the circumstances.

Abstract: A power supply system for illuminating an LED lamp unit 5, having a normal mode of operation in which a mains input 4 of a driver 3 of the LED lamp unit is supplied by mains power 1, and an emergency mode of operation, in which the LED lamp unit is supplied by a charge storage device 19, is disclosed. The system includes an emergency mode converter 21 operable to step-up the voltage from the charge storage device and to supply the mains driver input for illuminating the LED lamp unit.

Abstract: Lighting power supply system (1) including a mains input converter (11) operable to provide power, a controller (17) operable to control at least one element of the lighting system, a controller bus (26) and a controller interface (25) operable to provide control signals from the bus to the lighting system. An auxiliary converter (43) powers the lighting system from the bus and it may allow the controller to continue to be powered when the mains input is absent and an emergency battery (19) is depleted.