condition	mean	min	max
4 h after light	7.037	6.95303	7.12205
8 h after light	7.007853333333333	6.941660000000001	7.08098
12 h after light	6.9183666666666666	6.84479	7.02089
4 h after dark	6.95643	6.90066	6.98755
8 h after dark	6.89313	6.59247	7.10855
12 h after dark	6.937726666666666	6.917839999999999	6.968039999999999