To make a Tesla Coil you need to know a basic point
We can only understand that the Tesla Coil is a circuit that produces high voltage, high frequency electromagnetic field and even a low DC source.
Slayer exciter is a very simple version of the tesla coil as the slayer exciter requires only certain basic components (transistor, resistor, core coil and secondary coil) and also does not produce much heat because it consumes less energy.
But in the case of Tesla Coil proper adjustment of the windings is required to match its resonant frequency, and uses a large amount of energy due to large sparks.
Now it comes to its operation
With the circuit closed the transistor begins to function as a switching device and this action produces a powerful pulse wave which is also connected to the main coil.
The cause of a high power output is a second coil with an air cable.
These steps describe how a high frequency, high voltage wave is formed.
So now the earth works as a ground (0 volts) and the free end of the second coil acts as a positive point, this setting acts as a ventilated Capacitor as a dielectric.
We can also connect the end of the second coil to any bare metal conductor (increasing the area of the vertical plate).
Now as this function as a capacitor high voltage electric fields are produced on all plates.
When a CFL or any Flurocent Bulb is placed near a coil it cuts off the electric field and the particles inside the lights cheer up because of the field, and because of the excitement it hits the flexible walls and tsi up.
This is why CFL light only comes close to coil.
