Effects of Lighting Quality on Working Efficiency of Workers in Office Building in Tanzania

Table 2

The correlation coefficients and significance levels between the variables for the lighting quality and its suitability.

Variables		L&D	VC	Pr	IR	Br&C
Lighting level and distribution (L&D)	Pearson’s correlation	1
	Sig. 2-tailed
	N	171
Visual comfort (VC)	Pearson’s correlation	0.532	1
	Sig. 2-tailed	0.0001
	N	171	171
Precision (Pr)	Pearson’s correlation	0.196	0.333	1
	Sig. 2-tailed	0.010	0.0001
	N	171	171	171
Internal reflection (IR)	Pearson’s correlation	0.179	0.280	0.448	1
	Sig. 2-tailed	0.019	0.0001	0.0001
	N	171	171	171	171
Brightness and color contrast (Br& C)	Pearson’s correlation	0.195	0.279	0.310	0.335	1
	Sig. 2-tailed	0.011	0.0001	0.0001	0.0001
	N	171	171	171	171	171

The correlations which are significant with respect to α = 0.05. The correlations which are significant with respect to α = 0.01.