Figure 2
From: Weak evidence of bright light effects on human LH and FSH
LH responses grouped by age group and times of light stimulus. The log LH response index (as described for Figure 1) is shown separately for young and older subjects versus the time of stimulus (in reference to the acrophase-peak of 6-sulfatoxymelatonin). Thick horizontal lines are medians. Blue and green boxes are interquartile ranges. The thin bars represent the range for each time bin.