A tungsten filament is an artificial light source that uses a tungsten wire enclosed within a glass envelope. When electricity passes through the filament, it heats up and emits a bright, continuous light, commonly used in photography and studio lighting.
Photographers use tungsten filament lights for consistent, controllable illumination, particularly in studio and indoor settings. Understanding the characteristics of tungsten light, including its warm colour temperature, helps achieve accurate colour balance and high-quality results in both film and digital photography.