Understand light.
Design with purpose.
Explore the science, controls and design decisions behind better lighting. Read our English editions of the articles published in the Chinese knowledge center.
Human-Centric Lighting
Light, daily rhythms and visual comfort.
Classroom Lighting Standard in China: What Changes in GB 7793-2025 vs. the 2010 Edition
GB 7793-2025 takes effect on 1 November 2026. Desk ≥300 lx and writing board ≥500 lx are unchanged; new requirements include RG0 blue light, PstLM ≤1, SVM ≤1, R9 >0, 3300–5300 K and lighting power density ≤8 W/m².
Read article →Blue-Light Hazard Risk Groups Explained: What Do RG0, RG1, RG2 and RG3 Mean, and Which Is Allowed in Classrooms?
RG0–RG3 are the photobiological safety risk groups of IEC 62471 / GB/T 20145. RG0 means no retinal blue-light hazard within 10,000 s of direct viewing; RG1 within 100 s. GB 7793-2025 requires RG0 for classroom general lighting and RG0 or RG1 for board lights.
Read article →Colour Temperature and Circadian Rhythms: 4000 K in Office Lighting
Correlated colour temperature (CCT) influences how a workplace looks and feels. Explore the original article’s case for 4000 K, dynamic lighting schedules and practical luminaire selection.
Read article →What Is Human-Centric Lighting? Science, Design and Applications
Human-centric lighting (HCL) puts human physiological and psychological needs at the heart of lighting design. Explore its scientific basis, design considerations and practical applications.
Read article →Smart Lighting Control
Protocols, systems and responsive lighting scenes.
Lighting & Business ROI
Connect lighting design with the experience of your business.
Healthy Environment
Lighting quality and people-focused buildings.