The present invention is related to a device for generating high lux intensity light comprising a filament-less lamp with a customized integrated electronic circuit that can maximize the lux intensity. The customized integrated electronic circuit has also been used in a transformer-less and battery-less high-density electron generator for generating high electron acceleration. The low-cost, light weight device is effective in killing harmful pathogens in a very short span of time.

A device for providing power to a light arrangement (1) having a current conducting state and a current blocking state. The device comprises a storage circuit (2) with a capacitor (21) coupled to the light arrangement (1) and a resistor (22) located in parallel to the capacitor, a first determination circuit (3) for determining the state of the lighting arrangement, a second determination circuit (4) for, in the current blocking state, determining points of two discharging curves of the storage circuit, a derivation circuit (5) for deriving a condition of the storage circuit, such as life-end, from the discharging curves, a switch circuit (6) comprising an element (61), wherein the switch circuit is configured to switch the element (61) in parallel to the capacitor (21), whereby a first discharging curve is determined with the element being disconnected from the capacitor and a second discharging curve is determined with the element being connected to the capacitor, the capacitor discharging via both the resistor (22) and the element (61). The element (61) may comprise a resistor, a capacitor or an inductor.

The invention describes an ignitor arrangement (1) for a high-intensity discharge lamp (2), which ignitor arrangement (1) comprises a first pair of input terminals (101, 102) for applying an ignition voltage to the ignitor arrangement (1); a second pair of input terminals (101, 103) for applying an input drive voltage to the ignitor arrangement (1); and a discharge resistor (10) arranged in the interior (100) of the ignitor arrangement (1) and connected across the first input terminal pair (101, 102), which discharge resistor (10) is realized as a temperature-dependent resistor (10). The invention also describes a lamp driver (3) realized to drive a high-intensity discharge lamp (2); a lighting arrangement (4); and a method of driving a high-intensity discharge lamp (2).

A device for providing power to a light arrangement (1) having a current conducting state and a current blocking state. The device comprises a storage circuit (2) with a capacitor (21) coupled to the light arrangement (1) and a resistor (22) located in parallel to the capacitor, a first determination circuit (3) for determining the state of the lighting arrangement, a second determination circuit (4) for, in the current blocking state, determining points of two discharging curves of the storage circuit, a derivation circuit (5) for deriving a condition of the storage circuit, such as life-end, from the discharging curves, a switch circuit (6) comprising an element (61), wherein the switch circuit is configured to switch the element (61) in parallel to the capacitor (21), whereby a first discharging curve is determined with the element being disconnected from the capacitor and a second discharging curve is determined with the element being connected to the capacitor, the capacitor discharging via both the resistor (22) and the element (61). The element (61) may comprise a resistor, a capacitor or an inductor.

The invention describes an ignitor arrangement (1) for a high-intensity discharge lamp (2), which ignitor arrangement (1) comprises a first pair of input terminals (101, 102) for applying an ignition voltage to the ignitor arrangement (1); a second pair of input terminals (101, 103) for applying an input drive voltage to the ignitor arrangement (1); and a discharge resistor (10) arranged in the interior (100) of the ignitor arrangement (1) and connected across the first input terminal pair (101, 102), which discharge resistor (10) is realised as a temperature-dependent resistor (10). The invention also describes a lamp driver (3) realised to drive a high-intensity discharge lamp (2); a lighting arrangement (4); and a method of driving a high-intensity discharge lamp (2).

The lighting device of one aspect according to the present disclosure calculates, based on a voltage value of an AC voltage applied to a discharge lamp and a current value of AC current flowing through the discharge lamp, a first power value defined as a value of power supplied to the discharge lamp in a first half period of the AC voltage and a second power value defined as a value of power supplied to the discharge lamp in a second half period of the AC voltage. The lighting device determines that a ground fault has occurred, when an imbalance state in which a difference between the first power value and the second power value is equal to or greater than a threshold value continues for a predetermined time period.

The present disclosure is directed to a method for detecting a failure in a signal light. In one embodiment, the method includes monitoring operation of one or more light emitting diodes (LEDs) of the signal light coupled to a constant current driver, detecting a short circuit in at least one of the one or more LEDs and signaling a failure in the signal light when the short circuit is detected.