condition	mean	min	max
4 h after light	691.5	691.5	691.5
8 h after light	661.55	653.6	669.5
12 h after light	594.3	567.0	621.6
4 h after dark	666.45	663.7	669.2
8 h after dark	624.8	615.3	634.3
12 h after dark	632.05	570.8	693.3