A gas-discharge lamp is a light source that uses electricity to ionize gases inside the lamp, resulting in the emission of light. There are several types of gas-discharge lamps, including fluorescent lamps, neon lamps, and mercury-vapor lamps. If you're in need of synonyms for the term "gas-discharge lamp," there are a few options to consider. Some of the most common synonyms for this type of lighting include discharge lamp, gas lamp, and plasma lamp. Additionally, you might see the term arc lamp used to describe this type of lighting, as it produces light through an electric arc rather than a filament.