diff --git a/homeassistant/components/lifx/services.py b/homeassistant/components/lifx/services.py
index 2e5da5f11489..a522e1364203 100644
--- a/homeassistant/components/lifx/services.py
+++ b/homeassistant/components/lifx/services.py
@@ -115,8 +115,13 @@ LIFX_EFFECT_SCHEMA = {
 LIFX_EFFECT_PULSE_SCHEMA = cv.make_entity_service_schema(
     {
         **LIFX_EFFECT_SCHEMA,
-        probatio.Exclusive(ATTR_BRIGHTNESS, ATTR_BRIGHTNESS): VALID_BRIGHTNESS,
-        probatio.Exclusive(ATTR_BRIGHTNESS_PCT, ATTR_BRIGHTNESS): VALID_BRIGHTNESS_PCT,
+        # A brightness of zero would pulse to black
+        probatio.Exclusive(ATTR_BRIGHTNESS, ATTR_BRIGHTNESS): probatio.All(
+            VALID_BRIGHTNESS, probatio.Clamp(min=1)
+        ),
+        probatio.Exclusive(ATTR_BRIGHTNESS_PCT, ATTR_BRIGHTNESS): probatio.All(
+            VALID_BRIGHTNESS_PCT, probatio.Clamp(min=1)
+        ),
         probatio.Exclusive(ATTR_COLOR_NAME, COLOR_GROUP): cv.string,
         probatio.Exclusive(ATTR_RGB_COLOR, COLOR_GROUP): probatio.All(
             probatio.Coerce(tuple), probatio.ExactSequence((cv.byte, cv.byte, cv.byte))
@@ -152,11 +157,12 @@ LIFX_EFFECT_COLORLOOP_SCHEMA = cv.make_entity_service_schema(
         **LIFX_EFFECT_SCHEMA,
         probatio.Exclusive(ATTR_BRIGHTNESS, ATTR_BRIGHTNESS): VALID_BRIGHTNESS,
         probatio.Exclusive(ATTR_BRIGHTNESS_PCT, ATTR_BRIGHTNESS): VALID_BRIGHTNESS_PCT,
+        # A saturation of zero switches the bulb to color temperature mode
         ATTR_SATURATION_MAX: probatio.All(
-            probatio.Coerce(int), probatio.Clamp(min=0, max=100)
+            probatio.Coerce(int), probatio.Clamp(min=1, max=100)
         ),
         ATTR_SATURATION_MIN: probatio.All(
-            probatio.Coerce(int), probatio.Clamp(min=0, max=100)
+            probatio.Coerce(int), probatio.Clamp(min=1, max=100)
         ),
         ATTR_PERIOD: probatio.All(probatio.Coerce(float), probatio.Clamp(min=0.05)),
         ATTR_CHANGE: probatio.All(
diff --git a/homeassistant/components/lifx/services.yaml b/homeassistant/components/lifx/services.yaml
index 38deb806bd71..bf72102f7c9e 100644
--- a/homeassistant/components/lifx/services.yaml
+++ b/homeassistant/components/lifx/services.yaml
@@ -186,7 +186,6 @@ effect_move:
             - left
     theme:
       example: exciting
-      default: exciting
       selector:
         select:
           mode: dropdown
diff --git a/tests/components/lifx/test_light.py b/tests/components/lifx/test_light.py
index 89ba9769a1b9..2bfa1567c5a7 100644
--- a/tests/components/lifx/test_light.py
+++ b/tests/components/lifx/test_light.py
@@ -341,6 +341,33 @@ async def test_effect_pulse_reads_color_before_merging(
     assert effect.color == HSBK(120.0, 1.0, 128 / 255, 3500)
 
 
+@pytest.mark.parametrize(
+    ("brightness", "expected"),
+    [
+        pytest.param({ATTR_BRIGHTNESS: 0}, 1 / 255, id="brightness"),
+        pytest.param({ATTR_BRIGHTNESS_PCT: 0}, 0.01, id="brightness_pct"),
+    ],
+)
+async def test_effect_pulse_clamps_brightness_above_zero(
+    hass: HomeAssistant,
+    mock_effect_conductor: MagicMock,
+    brightness: dict[str, int],
+    expected: float,
+) -> None:
+    """Test a zero brightness is raised, as it would pulse to black."""
+    await async_setup_lifx_entry(hass, create_mock_light())
+
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_EFFECT_PULSE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_HS_COLOR: (120.0, 50.0), **brightness},
+        blocking=True,
+    )
+
+    effect, _ = mock_effect_conductor.start.await_args.args
+    assert effect.color == HSBK(120.0, 0.5, expected, 3500)
+
+
 async def test_effect_colorloop_uses_public_effect_defaults(
     hass: HomeAssistant, mock_effect_conductor: MagicMock
 ) -> None:
@@ -390,6 +417,24 @@ async def test_effect_colorloop_orders_saturation_bounds(
     assert effect.saturation_max == 0.8
 
 
+async def test_effect_colorloop_clamps_saturation_above_zero(
+    hass: HomeAssistant, mock_effect_conductor: MagicMock
+) -> None:
+    """Test a zero saturation is raised, as it switches the bulb to white."""
+    await async_setup_lifx_entry(hass, create_mock_light())
+
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_EFFECT_COLORLOOP,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_SATURATION_MIN: 0, ATTR_SATURATION_MAX: 0},
+        blocking=True,
+    )
+
+    effect = mock_effect_conductor.start.await_args.args[0]
+    assert effect.saturation_min == 0.01
+    assert effect.saturation_max == 0.01
+
+
 async def test_effect_colorloop_accepts_absolute_brightness(
     hass: HomeAssistant, mock_effect_conductor: MagicMock
 ) -> None:
@@ -1670,6 +1715,26 @@ def test_theme_selector_options_match_the_library(service: str) -> None:
     assert options == sorted(ThemeLibrary.get_available_themes())
 
 
+@pytest.mark.parametrize(
+    ("service", "default"),
+    [
+        pytest.param(SERVICE_EFFECT_MOVE, None, id="move"),
+        pytest.param(SERVICE_PAINT_THEME, "exciting", id="paint_theme"),
+    ],
+)
+def test_theme_field_default_matches_the_action(
+    service: str, default: str | None
+) -> None:
+    """Test the UI pre-fills the theme the action applies when none is given.
+
+    Move applies no theme without one, so a default would suggest a color
+    change the action does not otherwise make.
+    """
+    services = load_yaml_dict(f"{lifx.__path__[0]}/services.yaml")
+
+    assert services[service]["fields"][ATTR_THEME].get("default") == default
+
+
 @pytest.mark.parametrize(
     ("service", "factory", "palette"),
     [