condition	mean	min	max
4 h after light	17.5633345	16.891669	18.235
8 h after light	19.94473	18.106026	21.783434
12 h after light	15.405724	15.254187	15.557261
4 h after dark	15.280246	14.950685	15.609807
8 h after dark	17.1173605	16.476101	17.75862
12 h after dark	13.065921	13.065921	13.065921