condition mean min max 4 h after light 3.1099289999999997 2.989788 3.3156449999999995 8 h after light 2.234139 1.555221 2.586895 12 h after light 1.4933216666666667 1.349265 1.61704 16 h after light 3.024319 2.561635 3.5770980000000003 4 h after dark 2.473341 2.257879 2.838188 8 h after dark 1.6215870000000001 1.607061 1.645441