condition mean min max 4 h after light 4.02478 2.79207 5.25749 8 h after light 2.84948 2.12928 3.56968 12 h after light 3.522985 2.42981 4.61616 4 h after dark 9.15371 6.10712 12.2003 8 h after dark 6.43656 6.03367 6.83945 12 h after dark 5.485485000000001 4.10754 6.86343