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

Table 2

value of significance analysis for the above factors.

Parameters	CCT	CRI	Luminance	Experimental duration
r	0.351	0.176	0.379	−0.770
	≤0.001	0.005	≤0.001	≤0.001

Correlation is significant at the 0.01 level (2-tailed).