Architectural lighting is the intersection of lighting engineering and architectural design. It goes beyond functional illumination to shape how people perceive and experience spaces. Key techniques include: grazing (highlighting wall textures), wall-washing (even vertical illumination), cove lighting (indirect ambient), and silhouette lighting. Design parameters include beam angle selection (10°–120°), color temperature (2700K–4000K for interiors), CRI≥90 for material rendering, and integration with building management systems (DALI/KNX). Reference: CIE 150:2017 Guide on the Limitation of Obtrusive Light.