condition mean min max 0 h after light 5.055575 4.76674 5.34441 4 h after light 6.48787 5.94921 7.02653 8 h after light 6.302675 5.90151 6.70384 4 h after dark 7.38124 6.70504 8.05744 8 h after dark 6.857015 6.21442 7.49961 12 h after dark 5.69678 5.02733 6.36623