condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0187449 0.0 0.0562347 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0 0.0 0.0 9 h after dark 0.0 0.0 0.0 12 h after dark 0.03407535 0.0 0.0681507