How Compact Fluorescent Lamps Work - CFL Diagram & Explanation #79773 (License: Personal Use)

This illustration depicts a compact fluorescent lamp (CFL), featuring a yellow coiled glass tube filled with mercury vapor and coated internally with phosphor. When electricity excites the gas, UV light is emitted and converted to visible light by the phosphor layer. The two black legs represent the electrical contacts connecting to the lamp’s ballast and socket.

Used in educational content, energy-efficiency guides, or lighting product pages to explain CFL technology; targets users seeking eco-friendly lighting alternatives or comparing LED vs. CFL bulbs.