The changing electric field creates current and between the plates of a capacitor, there exists displacement current. I wonder what happens when a lamp put between the plates of capacitor with no electrical conducting path? Does it light up? I really need help and if you find demo videos etc. would be really good. Thanks.
You may be interested in the following two references which seem similar to what you are asking about:
Quoting from the Guardian reference: A fluorescent tube glows when an electrical voltage is set up across it. The electric field set up inside the tube excites atoms of mercury gas, making them emit ultraviolet light. This invisible light strikes the phosphor coating on the glass tube, mak ing it glow. Because powerlines are typically 400,000volts, and Earth is at an electrical potential of zero volts, pylons create electric fields between the cables they carry and the ground.
If there is a difference of potential between the ends of a bulb a current will flow.