condition	mean	min	max
4 h after light	20.7589	18.919	22.5988
8 h after light	19.39765	18.1771	20.6182
12 h after light	16.21555	15.6679	16.7632
4 h after dark	19.66785	19.1965	20.1392
8 h after dark	20.77005	20.1563	21.3838
12 h after dark	22.52535	21.8812	23.1695