A lighting device includes a light-emitting diode (LED). A first carbon nanotube (CNT) is coupled to and extends from the LED. A second CNT is coupled to and extends from the LED. The first and second CNTs are configured to generate a voltage difference across the LED when the first and second CNTs are exposed to an electromagnetic (EM) field having a frequency within a predetermined range. The LED is configured to emit light when the voltage difference is greater than or equal to a threshold voltage.