Commercial lighting encompasses all illumination used in business premises—offices, retail spaces, hotels, restaurants, healthcare facilities, and educational institutions. Key design standards: EN 12464-1 specifies 300–500 lux for offices (UGR<19, CRI≥80), 300 lux for retail (CRI≥90 for fashion), and 200 lux for corridors. Modern commercial lighting favors LED panel lights, linear fixtures, track lighting, and integrated smart controls (DALI/0-10V) for energy code compliance (ASHRAE 90.1, Title 24).