condition	mean	min	max
4 h after light	6.921283333333333	6.830839999999999	6.991160000000001
8 h after light	6.524813333333333	6.33657	6.65751
12 h after light	6.65243	6.48036	6.789560000000001
4 h after dark	7.34088	7.15693	7.49575
8 h after dark	7.3127	7.01093	7.559810000000001
12 h after dark	7.578343333333334	7.43743	7.7214100000000006