The word 灯光 is formed by combining the character for "lamp" or "lantern" (灯) with the character for "light" or "brightness" (光). This creates a conceptual fusion where the first character provides the source or apparatus, and the second character describes its primary emitted quality or effect. Together, they produce the integrated idea of "lamplight" or "illumination", representing not just the physical object but the radiant atmosphere it creates.