condition	mean	min	max
4 h after light	15.4274485	14.180758	16.674139
8 h after light	19.2116465	16.716411	21.706882
12 h after light	16.7607535	16.157525	17.363982
4 h after dark	17.034945	17.00837	17.06152
8 h after dark	19.3167265	19.084893	19.54856
12 h after dark	17.06152	17.06152	17.06152