condition	mean	min	max
4 h after light	18.267611	16.99404	19.541182
8 h after light	17.1587945	16.968232	17.349357
12 h after light	20.2253435	18.112676	22.338011
4 h after dark	19.0724625	18.66808	19.476845
8 h after dark	17.83106	16.99404	18.66808
12 h after dark	19.966779	19.966779	19.966779