GB 7793-2025Hygienic standard for day lighting and artificial lighting for middle and elementary school (English PDF)

3 Terms and definitions

4 Hygienic requirements for the daylighting of classrooms

5 Hygienic requirements for the lighting of classrooms

6 Testing

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB 7793-2010 "Hygienic Standards for Daylighting and Illumination in Primary and Secondary School Classrooms". Compared with GB 7793-2010, except for the structure... Aside from adjustments and editorial changes, the main technical changes are as follows:

---The scope has been changed (see Chapter 1, Chapter 1 of the.2010 edition);

---Added "Classroom", "Secondary Vocational School", "Lighting Uniformity", "Writing Board", "Color Transmission Index", "Visible Light Transmission Ratio", and "Flicker". Terms and definitions for "index" and "flicker effect visibility" (see 3.1, 3.2, 3.4~3.9);

---The definitions of the terms "daylight factor" and "maintained average illuminance" have been changed (see 3.3, 3.10, and

3.8 in the.2010 edition);

---The following terms have been removed. "Window-to-floor area ratio", "Direct glare", "Reflectance ratio", "Illuminance uniformity", "Maintenance factor", "Reflected glare", "Color rendering index" and... The terminology and definitions of "Unified Glare Value" (see sections 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.9, and

3.10 of the.2010 edition);

---The requirements for lighting direction, daylight factor, window-to-floor area ratio, glare, and reflectivity of classroom surfaces have been changed (see 4.1, 4.2, 4.5, 4.6). 4.8 (4.1~

4.5 in the.2010 edition)

---Added requirements for uniform lighting and full window sunshine duration on the winter solstice (see 4.3, 4.4);

---Requirements for the color transmittance index and visible light transmittance of glass have been added (see 4.7);

---Classroom lighting requirements have been revised (see 5.1.1,

5.1 in the.2010 version);