condition	mean	min	max
4 h after light	7.180075	6.7591	7.60105
8 h after light	4.45864	4.00462	4.91266
12 h after light	10.267635	8.12307	12.4122
4 h after dark	21.18645	18.9867	23.3862
8 h after dark	32.4314	30.4958	34.367
12 h after dark	15.32245	14.3203	16.3246