condition mean min max 4 h after light 10.18845 10.1797 10.1972 8 h after light 9.819995 9.76388 9.87611 12 h after light 8.74719 8.73842 8.75596 4 h after dark 12.2913 11.6087 12.9739 8 h after dark 10.9444 10.6655 11.2233 12 h after dark 10.044895 9.49329 10.5965