condition	mean	min	max
4 h after light	8.4	8.4	8.4
8 h after light	16.7	16.4	17.0
12 h after light	40.35	26.6	54.1
4 h after dark	32.9	31.8	34.0
8 h after dark	18.8	7.6	30.0
12 h after dark	16.3	11.6	21.0