Table 6. The association of color temperature on subjective variables (alertness, safety, preference, visual comfort, satisfaction and performance).

	Color correlated temperature(k)
Variables	>6000K	<6000K	p.v
Alertness	3(1.0)	3.5(1.4)	0.11
Safety	1.0(0.94)	1.2(1.0)	0.6
Preference	7.4(2.2)	9.2(2.8)	0.004
Visual comfort	10(3.2)	9(3.6)	0.40
Satisfaction	2.2(0.7)	2(0.9)	0.2
Performance	2.7(1.0)	2.6(0.9)	0.8