Fig. 4From: Ambient-task combined lighting to regulate autonomic and psychomotor arousal levels without compromising subjective comfort to lightingPVT performance indices under the two types of combined lighting. Data are least-square means and the standard errors of the means (error bars) adjusted for the effects of experimental order. * P <0.05: The significance of difference between the low-low and high-low combined lightings within each age groupBack to article page