SOLUTION

A fluorescent lamp basically consists of a long glass gas discharge tube. Fluorescent lamps use the phenomenon of fluorescence.

The ‘Fluorescence’ is a conversion from UV radiation via phosphor powder on the inside of the tube to visual light, or rather light in the spectrum that the human eye can perceive. Once the conduction of electrons between the electrodes is complete, no more heating of the filaments is required and the whole system works at a much lower current.