condition	mean	min	max
4 h after light	6.328083333333333	6.013999999999999	6.55864
8 h after light	6.4048	6.36015	6.4438699999999995
12 h after light	6.642416666666667	6.53501	6.73624
4 h after dark	6.644146666666666	6.381469999999999	6.7813300000000005
8 h after dark	6.6747733333333334	6.40641	6.944210000000001
12 h after dark	6.69009	6.35551	6.95047