condition mean min max 4 h after light 0.6960109999999999 0.510334 0.881688 8 h after light 0.5469205 0.535757 0.558084 12 h after light 1.438445 1.35012 1.52677 4 h after dark 2.969135 1.99841 3.93986 8 h after dark 1.600865 1.56039 1.64134 12 h after dark 1.192865 1.06594 1.31979