kylmäkatodiputki
A kylmäkatodiputki, or cold cathode tube, is a type of gas-discharge lamp that produces light by passing an electric current through a gas at low pressure. Unlike hot cathode tubes, such as fluorescent lamps, cold cathode tubes do not require a heated filament to initiate the discharge. Instead, a high voltage is applied between two electrodes, causing the gas within the tube to ionize and emit light.
These tubes typically contain a low-pressure inert gas, such as neon, argon, or a mixture of gases.
Cold cathode tubes are known for their long lifespan, durability, and ability to start quickly. They are