| Category | Reference plane | Illuminance standard value (lux) |
| Exhibits that are particularly sensitive to light: textiles, embroidery, paper items, paintings, pottery (stone) utensils, dyed leather, taxidermy, etc. | Exhibit surface | 50 | Light-sensitive exhibits: ivory products, egg white paintings, corner products, oil paintings, unstained leather, bone products, bamboo and wood products, lacquerware, etc. | Exhibit surface | 150 | Exhibits that are not sensitive to light: metal products, stone utensils, gemstones, ceramics, rock and mineral specimens, glass products, enamel products, enamel ware, etc. | Exhibit surface | 300 | General showroom | Corridor ground | 150 | High-end showroom | Corridor ground | 100 |
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