condition mean min max 4 h after light 5.185553333333333 5.0499 5.34675 8 h after light 5.105066666666667 5.00197 5.24288 12 h after light 5.1258099999999995 4.91092 5.39561 4 h after dark 5.036953333333333 4.97075 5.110040000000001 8 h after dark 4.96079 4.93253 5.00871 12 h after dark 5.175956666666666 5.05668 5.355169999999999