Question

What is the electricity required to produce 1 photon,red photon and blue photon?

Answer 1

I hope is not too confusing...

Explanation:

As an example consider the spectrum:

We can change the wavelength `lambda` into frequency `f` using the speed of light in vacuum `c`:
`c=lambdaf`
so:
Blue light (roughly) `f_B=(3xx10^8)/(400xx10^-9)=7.5xx10^14Hz`
so we can find the energy needed to get one blue photon as:
`E=hf=6.63xx10^-34*7.5xx10^14=4.97xx10^-19~~5xx10^-19J`

Now if you have a light generator (hypothetical) you can feed one coulomb carrying this energy and it will produce one blue photon. In terms of current you can produce 1 blue photon each second if you send one of these coulombs of charge each second (representing a current of 1 Ampere).
So summarizing:

The real process of producing a blue photon could be simplified as:

Inside the atom of the filament, the electron that "acquired" energy from the current and jumped to a higher orbital relaxes back emitting the surplus energy in form of a photon of light.