Specialty fluorescent lamps

In low-pressure sodium lamps, the light source is an arc tube made of a long glass tube bent into a U-shape. Connecting the sodium lamp directly to the mains can cause its destruction, therefore, transformers with high dissipation reactance are used to power low-pressure sodium lamps, ensuring high voltage during ignition and limiting its value during normal operation. The category includes specialist fluorescent lamps - coloured, with specialist caps or operating voltage.