condition mean min max 4 h after light 38.45485 37.546 39.3637 8 h after light 30.13425 26.8301 33.4384 12 h after light 13.0882 12.1047 14.0717 4 h after dark 15.1904 14.4068 15.974 8 h after dark 14.6976 14.3636 15.0316 12 h after dark 25.34285 24.1529 26.5328