Abstract: A lamp system (10) includes a straight tube type lamp (13) and a socket (14). The straight tube type lamp (13) includes a straight tube type cover (20) containing a light-emitting element, and caps (23) arranged at both ends of the cover (20). A pair of lamp pins (30) whose tips respectively protrude in directions intersecting a lamp longitudinal direction are protrudingly provided on end faces of the caps (23) at both the ends. The socket (14) includes a socket body (41), a rotor (42) which is arranged in the socket body (41) and on which the pair of lamp pins (30) of the straight tube type lamp (13) are mounted, and a pair of terminals to which the pair of lamp pins (30) mounted on the rotor (42) are connected. At least the rotor (42) can move in the lamp longitudinal direction.

Abstract: A lamp system (10) includes a straight tube type lamp (13) and a socket (14). The straight tube type lamp (13) includes a straight tube type cover (20) containing a light-emitting element, and caps (23) arranged at both ends of the cover (20). A pair of lamp pins (30) whose tips respectively protrude in directions intersecting a lamp longitudinal direction are protrudingly provided on end faces of the caps (23) at both the ends. The socket (14) includes a socket body (41), a rotor (42) which is arranged in the socket body (41) and on which the pair of lamp pins (30) of the straight tube type lamp (13) are mounted, and a pair of terminals to which the pair of lamp pins (30) mounted on the rotor (42) are connected. At least the rotor (42) can move in the lamp longitudinal direction.

Abstract: When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section.

Abstract: A dedicated power source for LED lamps capable of reliably detecting attachment of an LED lamp is provided. A dedicated power source has a DC power source portion, and includes a lighting circuit which receives power supplied from the DC power source portion and light-controls an LED lamp including an LED element and a detection resistor connected in parallel to the LED element and an attachment detecting portion for detecting attachment of the LED lamp based on a voltage level changing in accordance with attachment/detachment of the detection resistor by attachment/detachment of the LED lamp.

Abstract: A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.

Abstract: When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section.

Abstract: An illuminating device includes a plurality of kinds of LEDs that emit light having different color temperatures; a plurality of LED lighting circuits that independently light the LEDs for each color temperature of emitted light; and a control unit that selects a first control changing illuminance of the LEDs as a whole by controlling the lighting of the LEDs and a second control changing the colors of light of the LEDs as a whole by controlling the lighting of the LEDs, and corrects an illuminance difference generated before and after the second control.

Abstract: According to one embodiment, a luminaire includes a light-emitting module, a first lighting circuit and a back-flow preventing circuit. The light-emitting module includes a light-emitting element and a capacitive element. The first lighting circuit is supplied with power from the first power supply and is configured to activate the light-emitting element. The back-flow preventing circuit interrupts current flowing in a direction from the capacitive element to the first lighting circuit.

Abstract: When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section.

Abstract: According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply and a power-supply-voltage converting section. The power-supply-voltage converting section includes a plurality of power-supply-voltage converting circuits provided between the rectifying circuit and a plurality of output sections to which loads are respectively connected. Switching elements configured to convert a power supply voltage rectified by the rectifying circuit and supply the power supply voltage to the loads are provided in the plurality of power-supply-voltage converting circuits. The switching elements of the plurality of power-supply-voltage converting circuits are set to at least two different switching frequencies and turned on and off with the respective switching frequencies fixed.

Abstract: Both ends of a lamp body are mounted on sockets of an apparatus body and a feeding unit configured to feed power to LEDs is provided on the back side facing the apparatus body of the lamp body.

Abstract: A DC power source unit 37 is provided which boosts source voltage from a power source portion 36. A lighting circuit 38 is provided which supplies DC voltage to loads, the DC voltage being obtained by stepping down output current of the DC power source circuit 37. A control circuit 39 is provided which controls the lighting circuit 38 in accordance with at least either voltage or current of LEDs 25 and controls the DC power source unit 37 so that a ratio of output voltage to voltage of the LEDs 25 becomes a preset fixed ratio.

Abstract: According to one embodiment, a light-emitting module includes a rectangular substrate, at least two light-emitting circuits and inter-module connection part. The light-emitting circuit connects plural light-emitting elements in a longitudinal direction of the substrate. The inter-module connection parts include respective pairs of electrodes connected with the respective light-emitting circuits on an end of the substrate in the longitudinal direction. The respective pairs of electrodes are arranged to be closer to side parts of the substrate in a short direction thereof than an arrangement area of the light-emitting elements and are arranged side by side in the longitudinal direction of the substrate.

Abstract: When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section.

Abstract: A lamp device includes a semiconductor light-emitting element. The lamp device includes a housing including a heat conductive part, and the heat conductive part is thermally connected to an external thermal radiator. Heat generated by the semiconductor light-emitting element is conducted to the thermal radiator through the heat conductive part. A thermosensor is thermally connected to the heat conductive part. The lamp device includes a lighting circuit to light the semiconductor light-emitting element, and the lighting circuit controls an output of the semiconductor light-emitting element according to detection of the thermosensor.

Abstract: According to an embodiment, a lamp main body, a lighting device, a reflecting member and a light-emitting module are provided. The lamp main body includes a case and a cap member attached to the case. The case includes an opening at one end and a hole in the other end center. The cap member integrally includes a projection insertable into the hole. The lighting device and the reflecting member are housed in the case. The lighting device includes a circuit board. The reflecting member configured to reflect light to the outside of the lamp main body includes a reflecting cylinder section including a small-diameter opening and a large-diameter opening. The diameter of the cylinder section expands further toward the large-diameter opening side. The light-emitting module is arranged on the projection to be capable of transmitting heat to the projection.

Abstract: A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.

Abstract: A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.

Abstract: According to one embodiment, a lighting device includes a control circuit that includes a threshold for a case where a pair of the illumination lamps are connected in series between a positive output end and a negative output end of a power supply circuit, and a threshold for a case where one illumination lamp is connected between the positive output end and the negative output end of the power supply circuit. The control circuit determines the connected lamp number of the illumination lamps to a direct-current power supply device based on a voltage between the positive output end and the negative output end of the power supply circuit and a voltage between a non-potential connection end and the positive output end or the negative output end, and selects the threshold corresponding to the connected lamp number to control the direct-current power supply device.

Abstract: When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section.