condition mean min max 2 h after light 1.067302 0.0 1.80949 6 h after light 1.0519445 0.187441 2.23681 10 h after light 0.9916735 0.294343 1.88132 14 h after light 1.2246643333333334 0.867806 1.61488 18 h after light 1.1331911666666667 0.42157 1.86506 2 h after dark 1.0013565 0.225893 2.28384