Abstract: A method in conjunction with an emergency light, and an emergency light with equipment comprising one or more LED light sources (52) for producing emergency lighting; a super capacitor (C1) arranged to supply one or more LED light sources (52), a charging apparatus (A) arranged to charge the super capacitor (C1) to a predetermined nominal voltage. The equipment of the emergency light further comprises means for deviating the charging voltage (U) produced by the charging apparatus; and means (C) for detecting the capacitor circuit voltage when the charging voltage is being deviated, the means (C) being arranged to detect a defect in the capacitor circuit in response to the voltage detection.

Abstract: A method in conjunction with an emergency light, and an emergency light with equipment comprising one or more LED light sources (52) for producing emergency lighting; a super capacitor (C1) arranged to supply one or more LED light sources (52), a charging apparatus (A) arranged to charge the super capacitor (C1) to a predetermined nominal voltage. The equipment of the emergency light further comprises means for deviating the charging voltage (U) produced by the charging apparatus; and means (C) for detecting the capacitor circuit voltage when the charging voltage is being deviated, the means (C) being arranged to detect a defect in the capacitor circuit in response to the voltage detection.

Abstract: A method for controlling the color temperature of a lighting fixture, and a lighting fixture, whereby the lighting fixture is implemented using differently colored light emitting diodes. The method comprises steps of generating light by differently colored light emitting diodes (R, G, B) and controlling a current (IdR, IdG, IdB) flowing through the differently colored light emitting diodes in order to provide the lighting fixture with a desired color temperature.

Abstract: A method for controlling the color temperature of a lighting fixture, and a lighting fixture, whereby the lighting fixture is implemented using differently colored light emitting diodes. The method comprises steps of generating light by differently colored light emitting diodes (R, G, B) and controlling a current (IdR, IdG, IdB) flowing through the differently colored light emitting diodes in order to provide the lighting fixture with a desired color temperature.

Abstract: A lighting fixture, in particular an exit sign luminaire or a similar instructive luminaire, which comprises a mounting housing (1) that is arranged to receive power supply (7) for a light source (5) of the luminaire and that is arranged for securing to a mounting base, such as a wall or a ceiling, and a sign part (2) that is arranged for securing in connection with the mounting housing (1). The mounting housing (1) is arranged to receive the light source (5) and the lighting fixture also comprises at least one optical fiber (6) arranged to transmit light, the first end (9) of which optical fiber is arranged in connection with the light source (5) in the mounting housing (1) and whose light-transmitting portion (8) is arranged in connection with the sign part (2) so as to illuminate it with light produced by the light source (5).

Abstract: An emergency lighting arrangement and an emergency lighting apparatus, the arrangement being configured to be coupled to a supply network and the arrangement comprising an electronic ballast for igniting and burning a fluorescent lamp, the emergency lighting apparatus comprising a battery (Batt), recharge device (3) for recharging the battery from the supply network, a supply device (4) for supplying the battery voltage further, and a control unit (B), which is configured to control the devices of the emergency lighting apparatus. The electronic ballast of the emergency lighting system is a controllably dimmable ballast, and the emergency lighting apparatus further comprises a dimming control unit (C) for controlling the dimming of the electronic ballast.

Abstract: A method for determining the remaining operating life of a fluorescent lamp comprising cathodes, when the fluorescent lamp is a part of a fluorescent lamp circuit, which in addition to the fluorescent lamp includes a ballast, for example a capacitor and an inductance. In accordance with the method the remaining operating life of the fluorescent lamp is deduced from a phase difference of a voltage applied over a cathode in relation to another current or voltage phase in the fluorescent lamp circuit.

Abstract: An emergency lighting arrangement and an emergency lighting apparatus, the arrangement being configured to be coupled to a supply network and the arrangement comprising an electronic ballast for igniting and burning a fluorescent lamp, the emergency lighting apparatus comprising a battery (Batt), recharge device (3) for recharging the battery from the supply network, a supply device (4) for supplying the battery voltage further, and a control unit (B), which is configured to control the devices of the emergency lighting apparatus. The electronic ballast of the emergency lighting system is a controllably dimmable ballast, and the emergency lighting apparatus further comprises means (C) for controlling the dimming of the electronic ballast.