What is combined with electroluminescence in a fluorescent lamp to produce light?

Fluorescent lamps utilize a process that combines electroluminescence with phosphorescence to produce light. In these lamps, an electric current travels through a gas, causing the gas to emit ultraviolet light due to electroluminescence. This ultraviolet light then interacts with a phosphor coating on the inside of the lamp, leading to phosphorescence. The phosphors absorb the ultraviolet radiation and re-emit it as visible light.

This process is what makes fluorescent lamps efficient and effective in producing bright, visible light while consuming less energy compared to traditional incandescent bulbs. The combination of these two luminescent processes is essential; electroluminescence creates the initial ultraviolet light, and phosphorescence converts it into the light we see.