fluorescent tube [2]

Tube in which the electric current produces ultraviolet radiation converted into visible light by a layer of a fluorescent substance.

pin

Cylindrical metal part that establishes electric contact when inserted into the corresponding outlet.

bulb

Long glass cylinder enclosing the components of this type of tube and diffusing light.

pin base

End of the tube equipped with two pins that, when inserted into the socket, connect the tube with the electric circuit.

pinch

Part in which the lead-in wires are attached.

exhaust tube

Glass tube used to empty the air from the bulb and then to fill it with inert gas before it is sealed.

lead-in wire

Electric conductor carrying the current to the filament.

gas

The tube is filled with an inert gas under low pressure, with mercury added.

mercury

A small amount of vaporized mercury, added to the gas, emits ultraviolet radiation during the electric discharge.

electrode

A device placed at each end of the tube; an electric discharge arcs between the two of them.

phosphorescent coating

The tube’s internal coating; it is composed of phosphate particles that convert ultraviolet rays into visible light.