condition mean min max 4 h after light 8.428813 7.44417 9.413456 8 h after light 9.5217965 8.756064 10.287529 12 h after light 9.212017 9.177511 9.246523 4 h after dark 9.466248 8.992444 9.940052 8 h after dark 9.328382999999999 9.24331 9.413456 12 h after dark 9.716703 9.716703 9.716703