condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.04374085 0.0 0.0874817 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0379804 0.0 0.0759608 12 h after dark 0.03176135 0.0 0.0635227