condition	mean	min	max
4 h after light	6.9752133333333335	6.90106	7.0728100000000005
8 h after light	6.665413333333333	6.616910000000001	6.7101
12 h after light	6.717083333333333	6.42375	6.9432100000000005
4 h after dark	6.5158000000000005	6.38742	6.665610000000001
8 h after dark	6.85341	6.722230000000001	6.99724
12 h after dark	6.832563333333334	6.629810000000001	7.00415