Rays emitted by a bulb connected to longitudinal current generated by a Tesla design implemented by Eric Dollard. A pushing force is felt from the bulb with the hand, while copper foil is attracted to the bulb. The longitudinal current is generated from a Tesla coil to a capacitor and spark gaps to a flat resonant coil and then picked up on a secondary in the same physical flat coil. You can read more about the ideas used to construct the resonant coils in Tesla’s 1893 lecture. One of the main phenomenon demonstrated is long distance power transmission.
See the effect of copper attraction compared to a regular bulb at 23:00