condition	mean	min	max
4 h after light	7.666803333333333	7.586110000000001	7.785310000000001
8 h after light	7.73809	7.58893	7.82037
12 h after light	7.546733333333333	7.46236	7.59665
4 h after dark	7.908593333333334	7.743060000000001	8.02208
8 h after dark	8.18505	8.139510000000001	8.23499
12 h after dark	8.55599	8.4628	8.61179