diff --git a/homeassistant/components/template/light.py b/homeassistant/components/template/light.py
index 07591ce9653..19eecaa7006 100644
--- a/homeassistant/components/template/light.py
+++ b/homeassistant/components/template/light.py
@@ -53,6 +53,7 @@ from .entity import AbstractTemplateEntity
 from .helpers import async_setup_template_platform
 from .template_entity import (
     TEMPLATE_ENTITY_COMMON_SCHEMA_LEGACY,
+    TEMPLATE_ENTITY_OPTIMISTIC_SCHEMA,
     TemplateEntity,
     make_template_entity_common_modern_schema,
 )
@@ -121,7 +122,7 @@ LEGACY_FIELDS = {
 
 DEFAULT_NAME = "Template Light"
 
-LIGHT_YAML_SCHEMA = vol.Schema(
+LIGHT_COMMON_SCHEMA = vol.Schema(
     {
         vol.Inclusive(CONF_EFFECT_ACTION, "effect"): cv.SCRIPT_SCHEMA,
         vol.Inclusive(CONF_EFFECT_LIST, "effect"): cv.template,
@@ -132,6 +133,8 @@ LIGHT_YAML_SCHEMA = vol.Schema(
         vol.Optional(CONF_LEVEL): cv.template,
         vol.Optional(CONF_MAX_MIREDS): cv.template,
         vol.Optional(CONF_MIN_MIREDS): cv.template,
+        vol.Required(CONF_OFF_ACTION): cv.SCRIPT_SCHEMA,
+        vol.Required(CONF_ON_ACTION): cv.SCRIPT_SCHEMA,
         vol.Optional(CONF_RGB_ACTION): cv.SCRIPT_SCHEMA,
         vol.Optional(CONF_RGB): cv.template,
         vol.Optional(CONF_RGBW_ACTION): cv.SCRIPT_SCHEMA,
@@ -142,9 +145,11 @@ LIGHT_YAML_SCHEMA = vol.Schema(
         vol.Optional(CONF_SUPPORTS_TRANSITION): cv.template,
         vol.Optional(CONF_TEMPERATURE_ACTION): cv.SCRIPT_SCHEMA,
         vol.Optional(CONF_TEMPERATURE): cv.template,
-        vol.Required(CONF_OFF_ACTION): cv.SCRIPT_SCHEMA,
-        vol.Required(CONF_ON_ACTION): cv.SCRIPT_SCHEMA,
     }
+)
+
+LIGHT_YAML_SCHEMA = LIGHT_COMMON_SCHEMA.extend(
+    TEMPLATE_ENTITY_OPTIMISTIC_SCHEMA
 ).extend(make_template_entity_common_modern_schema(DEFAULT_NAME).schema)
 
 LIGHT_LEGACY_YAML_SCHEMA = vol.All(
@@ -215,6 +220,7 @@ class AbstractTemplateLight(AbstractTemplateEntity, LightEntity):
     """Representation of a template lights features."""
 
     _entity_id_format = ENTITY_ID_FORMAT
+    _optimistic_entity = True
 
     # The super init is not called because TemplateEntity and TriggerEntity will call AbstractTemplateEntity.__init__.
     # This ensures that the __init__ on AbstractTemplateEntity is not called twice.
@@ -224,7 +230,6 @@ class AbstractTemplateLight(AbstractTemplateEntity, LightEntity):
         """Initialize the features."""
 
         # Template attributes
-        self._template = config.get(CONF_STATE)
         self._level_template = config.get(CONF_LEVEL)
         self._temperature_template = config.get(CONF_TEMPERATURE)
         self._hs_template = config.get(CONF_HS)
@@ -349,7 +354,7 @@ class AbstractTemplateLight(AbstractTemplateEntity, LightEntity):
         Returns True if any attribute was updated.
         """
         optimistic_set = False
-        if self._template is None:
+        if self._attr_assumed_state:
             self._state = True
             optimistic_set = True
 
@@ -1066,7 +1071,7 @@ class StateLightEntity(TemplateEntity, AbstractTemplateLight):
             )
         else:
             await self.async_run_script(off_script, context=self._context)
-        if self._template is None:
+        if self._attr_assumed_state:
             self._state = False
             self.async_write_ha_state()
 
@@ -1205,6 +1210,6 @@ class TriggerLightEntity(TriggerEntity, AbstractTemplateLight):
             )
         else:
             await self.async_run_script(off_script, context=self._context)
-        if self._template is None:
+        if self._attr_assumed_state:
             self._state = False
             self.async_write_ha_state()
diff --git a/tests/components/template/test_light.py b/tests/components/template/test_light.py
index bfffd0911a9..b42eba0665d 100644
--- a/tests/components/template/test_light.py
+++ b/tests/components/template/test_light.py
@@ -37,6 +37,9 @@ from tests.common import assert_setup_component
 # Represent for light's availability
 _STATE_AVAILABILITY_BOOLEAN = "availability_boolean.state"
 
+TEST_OBJECT_ID = "test_light"
+TEST_ENTITY_ID = f"light.{TEST_OBJECT_ID}"
+TEST_STATE_ENTITY_ID = "light.test_state"
 
 OPTIMISTIC_ON_OFF_LIGHT_CONFIG = {
     "turn_on": {
@@ -2740,3 +2743,51 @@ async def test_effect_with_empty_action(
     """Test empty set_effect action."""
     state = hass.states.get("light.test_template_light")
     assert state.attributes["supported_features"] == LightEntityFeature.EFFECT
+
+
+@pytest.mark.parametrize(
+    ("count", "light_config"),
+    [
+        (
+            1,
+            {
+                "name": TEST_OBJECT_ID,
+                "state": "{{ is_state('light.test_state', 'on') }}",
+                "turn_on": [],
+                "turn_off": [],
+                "optimistic": True,
+            },
+        )
+    ],
+)
+@pytest.mark.parametrize(
+    "style",
+    [ConfigurationStyle.MODERN, ConfigurationStyle.TRIGGER],
+)
+@pytest.mark.usefixtures("setup_light")
+async def test_optimistic_option(hass: HomeAssistant) -> None:
+    """Test optimistic yaml option."""
+    hass.states.async_set(TEST_STATE_ENTITY_ID, STATE_OFF)
+    await hass.async_block_till_done()
+
+    state = hass.states.get(TEST_ENTITY_ID)
+    assert state.state == STATE_OFF
+
+    await hass.services.async_call(
+        light.DOMAIN,
+        "turn_on",
+        {"entity_id": TEST_ENTITY_ID},
+        blocking=True,
+    )
+
+    state = hass.states.get(TEST_ENTITY_ID)
+    assert state.state == STATE_ON
+
+    hass.states.async_set(TEST_STATE_ENTITY_ID, STATE_ON)
+    await hass.async_block_till_done()
+
+    hass.states.async_set(TEST_STATE_ENTITY_ID, STATE_OFF)
+    await hass.async_block_till_done()
+
+    state = hass.states.get(TEST_ENTITY_ID)
+    assert state.state == STATE_OFF