condition mean min max 4 h after light 5.13258 4.99719 5.27715 8 h after light 4.939286666666667 4.85225 5.0023800000000005 12 h after light 4.89024 4.83335 4.9717400000000005 4 h after dark 5.002143333333334 4.93839 5.03674 8 h after dark 5.01762 4.97776 5.0381800000000005 12 h after dark 5.473496666666667 5.27491 5.58585