Light-emitting devices

1. A light emitting assembly comprising:

a light-emitting diode;

a power source;

a flexible cable connecting the power source and the light-emitting diode, the flexible cable comprising a first electrically conductive layer, a second electrically conductive layer disposed over the first electrically conductive layer, and an electrically insulating layer disposed between the first and second electrically conductive layers, wherein:

the first and second electrically conductive layers substantially overlay each other and have substantially the same area,

the first end of the flexible cable is electrically connected to the light-emitting diode, and

the flexible cable is configured to transmit electrical power to the light-emitting diode; and

a switch on the flexible cable, wherein the switch is configured to provide current to the light-emitting diode from the power source when in a first state and to not provide current from the power source to the light-emitting diode when in a second state,

wherein a distance between the light-emitting diode and the switch is less than 5 cm.

2. The assembly of claim 1 , wherein the switch is arranged in parallel with the light-emitting diode.

3. The assembly of claim 1 , wherein the switch comprises a field-effect transistor (FET).

4. The assembly of claim 1 , further comprising a third electrically conductive layer configured to transmit a control signal to a control terminal of the switch.

5. The assembly of claim 1 , wherein the switch is electrically connected to a cathode on the light-emitting diode.

6. The assembly of claim 1 , wherein a distance between the light-emitting diode and the switch is less than 1 cm.

7. The assembly of claim 1 , wherein the current provided to the light-emitting diode is greater than about 5 A.

8. A light emitting assembly, comprising:

a first light-emitting diode;

a second light-emitting diode;

a power source;

a flexible cable connecting the power source and the light emitting diodes, the flexible cable comprising a first electrically conductive layer; and

a switch on the flexible cable, wherein:

the switch is configured to provide current to the light-emitting diode from the power source when in a first state and to not provide current from the power source to the light-emitting diode when in a second state;

a distance between the light-emitting diode and the switch is less than 5 cm;

the first electrically conductive layer comprises a first electrically conductive portion and a second electrically conductive portion that are electrically insulated from each other;

the first electrically conductive portion is configured to at least in part provide electrical power to the first light-emitting diode; and

the second electrically conductive portion is configured to at least in part provide electrical power to the second light-emitting diode.

9. The assembly of claim 8 , wherein the first electrically conductive portion is electrically connected to a cathode of the first light-emitting diode, the second electrically portion is electrically connected to a cathode of the second light-emitting diode, and wherein the second electrically conductive layer is electrically connected to an anode of the first light-emitting diode and an anode of the second light-emitting diode.

10. The assembly of claim 9 , wherein the second electrically conductive layer is configured to be electrically grounded.

11. The assembly of claim 8 , wherein a distance between the switch and the first light emitting diode and/or a distance between the switch and the second light emitting diode is less than 5 cm.

12. The assembly of claim 8 , wherein a distance between the switch and the first light emitting diode and/or a distance between the switch and the second light emitting diode is less than 1 cm.

13. The assembly of claim 8 , wherein the current provided to the first and/or second light emitting diode is greater than about 5 A.

14. The assembly of claim 8 , wherein the switch comprises a field-effect transistor (FET).