condition mean min max 0 h after light 2.2027900000000002 2.138 2.26758 4 h after light 1.9761 1.70966 2.24254 8 h after light 2.539775 2.30826 2.77129 4 h after dark 3.14874 2.36738 3.9301 8 h after dark 4.058445 3.61267 4.50422 12 h after dark 1.51303 1.33208 1.69398