What type of lamp uses fluorescence to produce visible light and operates at low pressure?

Fluorescent lighting is the type of lamp that uses fluorescence to produce visible light and operates at low pressure. In fluorescent lights, an electric current passes through a gas, typically mercury vapor, which excites the gas and produces ultraviolet light. This ultraviolet light then interacts with a phosphorescent coating on the inside of the bulb, causing it to emit visible light.

This process is efficient and provides more light output per watt compared to other types of lighting technologies, such as incandescent bulbs, which produce light through the heating of a filament. The low-pressure operation of fluorescent lamps means they are designed to work with gas at lower pressures than those found in other types of lamps like high-intensity discharge lamps. Additionally, LED lights and halogen lamps operate on different principles: LED lights use solid-state lighting technology, while halogen lamps are a type of incandescent that operates at high pressure.