Make Wireless LEDs
check out my instructable : http://www.instructables.com/id/Easy-Wireless-LEDs/
Yes ! That's right ! now you can easily make your own wireless LEDs using some commonly available components. This circuit is basically an high frequency oscillator which is possible due to rapid switching of the on-board transistor which feeds the current to the emitter coil. This causes the magnetic flux to change rapidly and hence EMF is induced in the LED coil ( due to mutual induction ) .