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 0.0531745 0.0 0.106349 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0175589 0.0 0.0351178 12 h after dark 0.0 0.0 0.0