Magnetic Suspension Lamp- with helical LED filament: not only does this lamp defy gravity, the LED in the bulb is powered through wireless induction- and controlled by the switch in the base. This kind of levitation uses a control system with an adjustable electromagnet in a feedback loop with Hall effect sensors which allows for fine tuning of the magnetic field to exactly balance the pull of gravity. As seen at the end of the video- if this lamp design is unplugged (or the power goes off) the