condition mean min max 4 h after light 9.410713 9.055914 9.765512 8 h after light 9.002614 8.782478 9.22275 12 h after light 9.177417 8.985951 9.368883 4 h after dark 9.4566 9.368883 9.544317 8 h after dark 9.647193000000001 9.203822 10.090564 12 h after dark 10.477873 10.477873 10.477873