Study on the Influence of LED Spectrum on the Visual and Nonvisual Effects in the Interior Zone of Tunnels

Figure 2

Z-value of 1931 CIE-XYZ color coordinates. (a) CRI2012 = 65. (b) CRI2012 = 75. (c) CRI2012 = 85. (d) CRI2012 = 95.

(a)

(b)

(c)

(d)