condition mean min max 0 h after light 7.417925 7.17212 7.66373 4 h after light 5.616695 5.50662 5.72677 8 h after light 5.7053650000000005 5.44671 5.96402 4 h after dark 6.4856300000000005 6.17535 6.79591 8 h after dark 5.670885 5.37235 5.96942 12 h after dark 6.84326 6.01964 7.66688