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 0.0 0.0 0.0 4 h after dark 0.031347 0.0 0.062694 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0