condition	mean	min	max
4 h after light	6.816323333333334	6.68611	6.95735
8 h after light	6.900766666666667	6.781689999999999	7.07418
12 h after light	6.9061933333333325	6.70142	7.189939999999999
4 h after dark	6.979410000000001	6.782	7.3116
8 h after dark	6.8104466666666665	6.51917	7.04668
12 h after dark	6.84646	6.6437100000000004	7.02965