condition	mean	min	max
4 h after light	7.713046666666666	7.598610000000001	7.89134
8 h after light	7.60752	7.489	7.71345
12 h after light	7.801229999999999	7.68975	7.97025
4 h after dark	7.8621099999999995	7.5674399999999995	8.08055
8 h after dark	7.84365	7.682919999999999	7.95178
12 h after dark	7.584313333333333	7.45993	7.72765