condition mean min max 4 h after light 131.8 131.8 131.8 8 h after light 168.2 164.9 171.5 12 h after light 214.75 190.3 239.2 4 h after dark 400.65 368.8 432.5 8 h after dark 555.9 530.4 581.4 12 h after dark 419.65 369.7 469.6