condition mean min max 4 h after light 1.657565 1.31783 1.9973 8 h after light 1.054778 0.790506 1.31905 12 h after light 0.5526525 0.550226 0.555079 4 h after dark 1.2014513333333334 0.87806 1.82223 8 h after dark 1.068877 0.643551 1.49954 12 h after dark 1.88462 1.84705 1.94932