condition mean min max 4 h after light 8.724015000000001 8.12794 9.32009 8 h after light 9.384695 9.22614 9.54325 12 h after light 9.18244 8.9767 9.38818 4 h after dark 11.2525 10.4912 12.0138 8 h after dark 10.8418 10.7089 10.9747 12 h after dark 10.234485 9.76567 10.7033