2.2.3 Escape Route
In an emergency, when the escape tunnel (as shown in Figure 1) is occupied, the average level illumination provided by the escape tunnel lighting device shall not be lower than the illumination of the middle section (daytime), and the total uniformity of illumination shall not be less than 0.2, and the color development index Ra of the escape tunnel lighting source shall be ≥40.
2.2.4 refuge chamber
In an emergency, when the refuge room is occupied, the average maintenance level illumination provided by the refuge room lighting device shall be no less than 100lx, and the total uniformity of illumination shall be no less than 0.2, and the color development index Ra of the refuge room lighting source shall be ≥40.