Since the phosphors were relatively opaque, the system required very high accelerating voltages, between 25 and 40 kV.

Firstly, devices requiring different voltages required specialized generators with their own separate lines.

This process requires high voltages, which are built up in a charge pump over time.

Applications that once were thought to require higher voltages, such as electrical power steering, have now been achieved with 12 volt systems.

However, switching service requiring voltages above 20 kV and involving very short risetimes remains within the domain of the thyratron.

For micro fuel cells, this pumping requirement requires high voltages.

These combustion designs do not require high voltages to generate a plasma field.

This method, known as the electrolytic precipitation method, requires rather larger voltages than the others, typically 30-50 V.

Transistors were smaller and required lower voltages than vacuum tubes to work.

This simple realization requires rather high voltages ( 100 V) to keep the load current constant with sufficient approximation for all practical purposes.