DC-powered lighting device
A DC-powered lighting device ( 100 ) for placement in an external fixture ( 102 ) ( 104 ), the DC-powered lighting device comprising a lighting unit ( 110 ), connector pins ( 112 ) configured to mechanically and electrically connect the DC-powered lighting device to the light fixture, a probing unit ( 118 ) connected to the connector pins and configured to determine whether electrical power is currently available via the connector pins and to provide a power-present signal indicative of the current availability of electrical power via the connector pins, a DC-power input unit ( 114 ) configured to receive DC power from a second external electrical power source, and to deliver the received DC power to the lighting unit and a switching unit ( 120 ) configured to allow the delivery of the DC power to the lighting unit in dependence on the power-present signal.
1. A DC-powered lighting device for placement in an external light fixture, the DC-powered lighting device comprising:
a lighting unit configured to emit light in response to receiving DC power;
a connector configured to mechanically and electrically connect the DC-powered lighting device to the external light fixture;
a probing unit connected to the connector and configured to determine whether electrical power from a first external electrical power source is currently available via the connector and to provide a power-present signal having a signal value that is indicative of whether or not electrical power is currently available via the connector;
a DC-power input unit that is different from the connector and is configured to receive DC power from a second external electrical power source that is different from the first external electrical power source, and to deliver the received DC power to the lighting unit; and
a switching unit configured to allow or prevent the delivery of the DC power from the DC-power input unit to the lighting unit in dependence on the current signal value of the power-present signal,
wherein the DC-power input unit comprises a DC connector for connection to the second external electrical power source, and wherein the DC connector is an Ethernet connector or a universal serial bus connector.
2. The DC-powered lighting device of claim 1 , wherein the lighting unit comprises a housing that accommodates at least one DC-powered light emitting diode.
3. The DC powered lighting device of claim 1 , wherein the connector is a bi-pin connector or an Edison screw connector or a bayonet cap connector.
4. The DC-powered lighting device of claim 2 , further comprising an end cap arranged at one end of the housing and accommodating the probing unit, the DC-power input unit or the switching unit.
5. The DC-powered lighting device of claim 1 , wherein the DC-power input unit is further configured to receive operational data indicative of an instruction regarding an operational status of the DC-powered lighting device, and wherein the switching unit is further configured to allow the delivery of the DC-power to the lighting unit based on the received operational data.
6. The DC-powered lighting devices of claim 1 , wherein the DC connector is a plug-type connector that is connected to the switching unit by a cable that is configured to extend from the end cap to an exterior of the DC-powered lighting device in case of connection to the second external electrical power source.
7. The DC-powered lighting device of claim 6 wherein the end cap comprises a retraction mechanism that is configured to retract a cable into the end cap in case it is not connected to the second external electrical power source.
8. An electrical arrangement comprising a light fixture for connection of a lighting device to a first external electrical power source, and the DC-powered lighting device according to claim 1 , which is placed in the light fixture, the DC-powered lighting device configured to be connected to a second external electrical power source that provides DC power and is different from the first electrical power source.
9. The electrical arrangement of claim 8 , further comprising a network control device connected to the DC power input unit, the network control unit configured:
to receive the power-present signal from the DC-powered lighting device
to output operational data indicative of an instruction regarding an operational status of the DC-powered lighting device to the DC-powered lighting device.
10. A method for operating a DC-powered lighting device, the method comprising:
mechanically and electrically connecting the DC-powered lighting device to a light fixture via a connector;
determining whether electrical power from a first external electrical power source is currently available via the connector;
providing a power-present signal having a signal value that is indicative of whether or not electrical power is currently available via the connector;
receiving, via a DC-power input unit that is different from the connector pins, DC power from a second external electrical power source that is different from the first electrical power source; and
allowing or preventing a delivery of the DC power from the DC-power input unit to a lighting unit of the DC-powered lighting device in dependence on the current signal value of the power-present signal,
wherein the DC-power input unit comprises a DC connector for connection to the second external electrical power source, and wherein the DC connector is an Ethernet connector or a universal serial bus connector.
11. The method of claim 10 , further comprising:
receiving operational data indicative of an instruction regarding an operational status of the DC-powered lighting device; and
allowing or preventing a delivery of the DC power to the lighting unit further based on the received operational data.