condition mean min max 4 h after light 175.35096 164.571134 186.130786 8 h after light 159.780927 138.385719 181.176135 12 h after light 175.918714 166.548046 185.289382 4 h after dark 181.730662 176.111129 187.350195 8 h after dark 169.0541895 162.414784 175.693595 12 h after dark 131.177507 131.177507 131.177507