condition mean min max 4 h after light 1669.5276755 1666.062143 1672.993208 8 h after light 1796.1108915 1684.066649 1908.155134 12 h after light 2126.6449255 1901.057794 2352.232057 4 h after dark 1683.4027105 1392.265672 1974.539749 8 h after dark 2049.2242395000003 1547.477397 2550.971082 12 h after dark 1201.30898 1201.30898 1201.30898