neonilähteet
Neon sources refer to devices or phenomena that emit light due to the excitation of neon gas. Neon is a noble gas with the atomic number 10. When an electric current passes through neon gas at low pressure, its atoms become energized and then release this energy in the form of photons, which are perceived as light. The characteristic color of light emitted by neon gas is a bright reddish-orange.
The most common application of neon sources is in neon signs. These signs are made by heating
Beyond signage, neon sources can be found in some older types of electrical equipment as indicator lights.