condition mean min max 0 h after light 3.117825 3.05027 3.18538 4 h after light 4.78989 4.55596 5.02382 8 h after light 4.17692 4.04421 4.30963 4 h after dark 4.82094 4.53841 5.10347 8 h after dark 4.71837 4.56502 4.87172 12 h after dark 3.49111 3.10821 3.87401