condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.085886 0.0 0.171772 4 h after dark 0.04143215 0.0 0.0828643 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0