it consists only of atoms going into stable excited states

it consists of accelerated atoms/molecules striking suitable material

it consists of a molecule, atom or nanostructure relaxing to its ground state by emitting a photon of light after being excited to a higher quantum state by some type of energy

what happens in a fluorescent lamp

All atoms are in the same excited state and make transition to different states

All atoms are in the same excited state and make transition to same state

There are many atoms in different states of excitation making transition to different states

There are many atoms in different states of excitation making transition to the same state

they do not waste as much energy producing (invisible) infrared photons

they produce more white light

they do not waste as much energy producing visible photons

they do not use uv radiations

there is transition from one of the unstable orbits of definite energy to another of same energy

there is transition from one of the stable orbits of definite energy to another of lower energy.

there is transition from one of the unstable orbits of definite energy to another of higher energy

there is transition from one of the stable orbits of definite energy to another of higher energy

integral multiples of h

integral multiples of h/2(\pie)

integral multiples of h/(/pie)

continuous