condition	mean	min	max
4 h after light	9.5601	9.0938	10.0264
8 h after light	5.442785	5.09723	5.78834
12 h after light	11.74195	10.3934	13.0905
4 h after dark	15.061766666666667	12.9738	16.2253
8 h after dark	18.723	16.144	21.6704
12 h after dark	10.673556666666666	8.38407	13.4388