condition mean min max 4 h after light 1832.580711 1502.232057 2162.929365 8 h after light 2205.5754845 1864.4533 2546.697669 12 h after light 1830.7705179999998 1485.693595 2175.847441 4 h after dark 1783.2706065 1433.442912 2133.098301 8 h after dark 1568.098938 1438.25109 1697.946786 12 h after dark 1572.611098 1572.611098 1572.611098