diff --git a/CODEOWNERS b/CODEOWNERS
index fe3af4c1ee6..c6deb8e9f8f 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -242,6 +242,7 @@ homeassistant/components/keyboard_remote/* @bendavid
 homeassistant/components/knx/* @Julius2342 @farmio @marvin-w
 homeassistant/components/kodi/* @OnFreund @cgtobi
 homeassistant/components/konnected/* @heythisisnate @kit-klein
+homeassistant/components/kulersky/* @emlove
 homeassistant/components/lametric/* @robbiet480
 homeassistant/components/launch_library/* @ludeeus
 homeassistant/components/lcn/* @alengwenus
diff --git a/homeassistant/components/kulersky/__init__.py b/homeassistant/components/kulersky/__init__.py
new file mode 100644
index 00000000000..ff984e2c0d3
--- /dev/null
+++ b/homeassistant/components/kulersky/__init__.py
@@ -0,0 +1,44 @@
+"""Kuler Sky lights integration."""
+import asyncio
+
+import voluptuous as vol
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+
+from .const import DOMAIN
+
+CONFIG_SCHEMA = vol.Schema({DOMAIN: vol.Schema({})}, extra=vol.ALLOW_EXTRA)
+
+PLATFORMS = ["light"]
+
+
+async def async_setup(hass: HomeAssistant, config: dict):
+    """Set up the Kuler Sky component."""
+    return True
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
+    """Set up Kuler Sky from a config entry."""
+    for component in PLATFORMS:
+        hass.async_create_task(
+            hass.config_entries.async_forward_entry_setup(entry, component)
+        )
+
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry):
+    """Unload a config entry."""
+    unload_ok = all(
+        await asyncio.gather(
+            *[
+                hass.config_entries.async_forward_entry_unload(entry, component)
+                for component in PLATFORMS
+            ]
+        )
+    )
+    if unload_ok:
+        hass.data[DOMAIN].pop(entry.entry_id)
+
+    return unload_ok
diff --git a/homeassistant/components/kulersky/config_flow.py b/homeassistant/components/kulersky/config_flow.py
new file mode 100644
index 00000000000..2b22fcdbd31
--- /dev/null
+++ b/homeassistant/components/kulersky/config_flow.py
@@ -0,0 +1,29 @@
+"""Config flow for Kuler Sky."""
+import logging
+
+import pykulersky
+
+from homeassistant import config_entries
+from homeassistant.helpers import config_entry_flow
+
+from .const import DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+
+async def _async_has_devices(hass) -> bool:
+    """Return if there are devices that can be discovered."""
+    # Check if there are any devices that can be discovered in the network.
+    try:
+        devices = await hass.async_add_executor_job(
+            pykulersky.discover_bluetooth_devices
+        )
+    except pykulersky.PykulerskyException as exc:
+        _LOGGER.error("Unable to discover nearby Kuler Sky devices: %s", exc)
+        return False
+    return len(devices) > 0
+
+
+config_entry_flow.register_discovery_flow(
+    DOMAIN, "Kuler Sky", _async_has_devices, config_entries.CONN_CLASS_UNKNOWN
+)
diff --git a/homeassistant/components/kulersky/const.py b/homeassistant/components/kulersky/const.py
new file mode 100644
index 00000000000..ae1e7a435dc
--- /dev/null
+++ b/homeassistant/components/kulersky/const.py
@@ -0,0 +1,2 @@
+"""Constants for the Kuler Sky integration."""
+DOMAIN = "kulersky"
diff --git a/homeassistant/components/kulersky/light.py b/homeassistant/components/kulersky/light.py
new file mode 100644
index 00000000000..4c17d1bcba3
--- /dev/null
+++ b/homeassistant/components/kulersky/light.py
@@ -0,0 +1,210 @@
+"""Kuler Sky light platform."""
+import asyncio
+from datetime import timedelta
+import logging
+from typing import Callable, List
+
+import pykulersky
+
+from homeassistant.components.light import (
+    ATTR_BRIGHTNESS,
+    ATTR_HS_COLOR,
+    ATTR_WHITE_VALUE,
+    SUPPORT_BRIGHTNESS,
+    SUPPORT_COLOR,
+    SUPPORT_WHITE_VALUE,
+    LightEntity,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import EVENT_HOMEASSISTANT_STOP
+from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.event import async_track_time_interval
+from homeassistant.helpers.typing import HomeAssistantType
+import homeassistant.util.color as color_util
+
+from .const import DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+SUPPORT_KULERSKY = SUPPORT_BRIGHTNESS | SUPPORT_COLOR | SUPPORT_WHITE_VALUE
+
+DISCOVERY_INTERVAL = timedelta(seconds=60)
+
+PARALLEL_UPDATES = 0
+
+
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    config_entry: ConfigEntry,
+    async_add_entities: Callable[[List[Entity], bool], None],
+) -> None:
+    """Set up Kuler sky light devices."""
+    if DOMAIN not in hass.data:
+        hass.data[DOMAIN] = {}
+    if "devices" not in hass.data[DOMAIN]:
+        hass.data[DOMAIN]["devices"] = set()
+    if "discovery" not in hass.data[DOMAIN]:
+        hass.data[DOMAIN]["discovery"] = asyncio.Lock()
+
+    async def discover(*args):
+        """Attempt to discover new lights."""
+        # Since discovery needs to connect to all discovered bluetooth devices, and
+        # only rules out devices after a timeout, it can potentially take a long
+        # time. If there's already a discovery running, just skip this poll.
+        if hass.data[DOMAIN]["discovery"].locked():
+            return
+
+        async with hass.data[DOMAIN]["discovery"]:
+            bluetooth_devices = await hass.async_add_executor_job(
+                pykulersky.discover_bluetooth_devices
+            )
+
+            # Filter out already connected lights
+            new_devices = [
+                device
+                for device in bluetooth_devices
+                if device["address"] not in hass.data[DOMAIN]["devices"]
+            ]
+
+            for device in new_devices:
+                light = pykulersky.Light(device["address"], device["name"])
+                try:
+                    # Attempt to connect to this light and read the color. If the
+                    # connection fails, either this is not a Kuler Sky light, or
+                    # it's bluetooth connection is currently locked by another
+                    # device. If the vendor's app is connected to the light when
+                    # home assistant tries to connect, this connection will fail.
+                    await hass.async_add_executor_job(light.connect)
+                    await hass.async_add_executor_job(light.get_color)
+                except pykulersky.PykulerskyException:
+                    continue
+                # The light has successfully connected
+                hass.data[DOMAIN]["devices"].add(device["address"])
+                async_add_entities([KulerskyLight(light)], update_before_add=True)
+
+    # Start initial discovery
+    hass.async_add_job(discover)
+
+    # Perform recurring discovery of new devices
+    async_track_time_interval(hass, discover, DISCOVERY_INTERVAL)
+
+
+class KulerskyLight(LightEntity):
+    """Representation of an Kuler Sky Light."""
+
+    def __init__(self, light: pykulersky.Light):
+        """Initialize a Kuler Sky light."""
+        self._light = light
+        self._hs_color = None
+        self._brightness = None
+        self._white_value = None
+        self._available = True
+
+    async def async_added_to_hass(self) -> None:
+        """Run when entity about to be added to hass."""
+        self.async_on_remove(
+            self.hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, self.disconnect)
+        )
+
+    async def async_will_remove_from_hass(self) -> None:
+        """Run when entity will be removed from hass."""
+        await self.hass.async_add_executor_job(self.disconnect)
+
+    def disconnect(self, *args) -> None:
+        """Disconnect the underlying device."""
+        self._light.disconnect()
+
+    @property
+    def name(self):
+        """Return the display name of this light."""
+        return self._light.name
+
+    @property
+    def unique_id(self):
+        """Return the ID of this light."""
+        return self._light.address
+
+    @property
+    def device_info(self):
+        """Device info for this light."""
+        return {
+            "identifiers": {(DOMAIN, self.unique_id)},
+            "name": self.name,
+            "manufacturer": "Brightech",
+        }
+
+    @property
+    def supported_features(self):
+        """Flag supported features."""
+        return SUPPORT_KULERSKY
+
+    @property
+    def brightness(self):
+        """Return the brightness of the light."""
+        return self._brightness
+
+    @property
+    def hs_color(self):
+        """Return the hs color."""
+        return self._hs_color
+
+    @property
+    def white_value(self):
+        """Return the white value of this light between 0..255."""
+        return self._white_value
+
+    @property
+    def is_on(self):
+        """Return true if light is on."""
+        return self._brightness > 0 or self._white_value > 0
+
+    @property
+    def available(self) -> bool:
+        """Return True if entity is available."""
+        return self._available
+
+    def turn_on(self, **kwargs):
+        """Instruct the light to turn on."""
+        default_hs = (0, 0) if self._hs_color is None else self._hs_color
+        hue_sat = kwargs.get(ATTR_HS_COLOR, default_hs)
+
+        default_brightness = 0 if self._brightness is None else self._brightness
+        brightness = kwargs.get(ATTR_BRIGHTNESS, default_brightness)
+
+        default_white_value = 255 if self._white_value is None else self._white_value
+        white_value = kwargs.get(ATTR_WHITE_VALUE, default_white_value)
+
+        if brightness == 0 and white_value == 0 and not kwargs:
+            # If the light would be off, and no additional parameters were
+            # passed, just turn the light on full brightness.
+            brightness = 255
+            white_value = 255
+
+        rgb = color_util.color_hsv_to_RGB(*hue_sat, brightness / 255 * 100)
+
+        self._light.set_color(*rgb, white_value)
+
+    def turn_off(self, **kwargs):
+        """Instruct the light to turn off."""
+        self._light.set_color(0, 0, 0, 0)
+
+    def update(self):
+        """Fetch new state data for this light."""
+        try:
+            if not self._light.connected:
+                self._light.connect()
+            # pylint: disable=invalid-name
+            r, g, b, w = self._light.get_color()
+        except pykulersky.PykulerskyException as exc:
+            if self._available:
+                _LOGGER.warning("Unable to connect to %s: %s", self._light.address, exc)
+            self._available = False
+            return
+        if not self._available:
+            _LOGGER.info("Reconnected to %s", self.entity_id)
+            self._available = True
+
+        hsv = color_util.color_RGB_to_hsv(r, g, b)
+        self._hs_color = hsv[:2]
+        self._brightness = int(round((hsv[2] / 100) * 255))
+        self._white_value = w
diff --git a/homeassistant/components/kulersky/manifest.json b/homeassistant/components/kulersky/manifest.json
new file mode 100644
index 00000000000..4f445e4fc18
--- /dev/null
+++ b/homeassistant/components/kulersky/manifest.json
@@ -0,0 +1,12 @@
+{
+  "domain": "kulersky",
+  "name": "Kuler Sky",
+  "config_flow": true,
+  "documentation": "https://www.home-assistant.io/integrations/kulersky",
+  "requirements": [
+    "pykulersky==0.4.0"
+  ],
+  "codeowners": [
+    "@emlove"
+  ]
+}
diff --git a/homeassistant/components/kulersky/strings.json b/homeassistant/components/kulersky/strings.json
new file mode 100644
index 00000000000..ad8f0f41ae7
--- /dev/null
+++ b/homeassistant/components/kulersky/strings.json
@@ -0,0 +1,13 @@
+{
+  "config": {
+    "step": {
+      "confirm": {
+        "description": "[%key:common::config_flow::description::confirm_setup%]"
+      }
+    },
+    "abort": {
+      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
+      "no_devices_found": "[%key:common::config_flow::abort::no_devices_found%]"
+    }
+  }
+}
diff --git a/homeassistant/components/kulersky/translations/en.json b/homeassistant/components/kulersky/translations/en.json
new file mode 100644
index 00000000000..f05becffed3
--- /dev/null
+++ b/homeassistant/components/kulersky/translations/en.json
@@ -0,0 +1,13 @@
+{
+    "config": {
+        "abort": {
+            "no_devices_found": "No devices found on the network",
+            "single_instance_allowed": "Already configured. Only a single configuration possible."
+        },
+        "step": {
+            "confirm": {
+                "description": "Do you want to start set up?"
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/homeassistant/generated/config_flows.py b/homeassistant/generated/config_flows.py
index a8e871aa02e..833f11190b6 100644
--- a/homeassistant/generated/config_flows.py
+++ b/homeassistant/generated/config_flows.py
@@ -108,6 +108,7 @@ FLOWS = [
     "juicenet",
     "kodi",
     "konnected",
+    "kulersky",
     "life360",
     "lifx",
     "local_ip",
diff --git a/requirements_all.txt b/requirements_all.txt
index cb93fc3e7c9..725bc5f0c09 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1475,6 +1475,9 @@ pykira==0.1.1
 # homeassistant.components.kodi
 pykodi==0.2.1
 
+# homeassistant.components.kulersky
+pykulersky==0.4.0
+
 # homeassistant.components.kwb
 pykwb==0.0.8
 
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index df7cbdafc63..c3f8ed3c3b7 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -745,6 +745,9 @@ pykira==0.1.1
 # homeassistant.components.kodi
 pykodi==0.2.1
 
+# homeassistant.components.kulersky
+pykulersky==0.4.0
+
 # homeassistant.components.lastfm
 pylast==4.0.0
 
diff --git a/tests/components/kulersky/__init__.py b/tests/components/kulersky/__init__.py
new file mode 100644
index 00000000000..2b723b28fbd
--- /dev/null
+++ b/tests/components/kulersky/__init__.py
@@ -0,0 +1 @@
+"""Tests for the Kuler Sky integration."""
diff --git a/tests/components/kulersky/test_config_flow.py b/tests/components/kulersky/test_config_flow.py
new file mode 100644
index 00000000000..59e3188fd7e
--- /dev/null
+++ b/tests/components/kulersky/test_config_flow.py
@@ -0,0 +1,104 @@
+"""Test the Kuler Sky config flow."""
+import pykulersky
+
+from homeassistant import config_entries, setup
+from homeassistant.components.kulersky.config_flow import DOMAIN
+
+from tests.async_mock import patch
+
+
+async def test_flow_success(hass):
+    """Test we get the form."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    assert result["type"] == "form"
+    assert result["errors"] is None
+
+    with patch(
+        "homeassistant.components.kulersky.config_flow.pykulersky.discover_bluetooth_devices",
+        return_value=[
+            {
+                "address": "AA:BB:CC:11:22:33",
+                "name": "Bedroom",
+            }
+        ],
+    ), patch(
+        "homeassistant.components.kulersky.async_setup", return_value=True
+    ) as mock_setup, patch(
+        "homeassistant.components.kulersky.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {},
+        )
+        await hass.async_block_till_done()
+
+    assert result2["type"] == "create_entry"
+    assert result2["title"] == "Kuler Sky"
+    assert result2["data"] == {}
+
+    assert len(mock_setup.mock_calls) == 1
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+async def test_flow_no_devices_found(hass):
+    """Test we get the form."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    assert result["type"] == "form"
+    assert result["errors"] is None
+
+    with patch(
+        "homeassistant.components.kulersky.config_flow.pykulersky.discover_bluetooth_devices",
+        return_value=[],
+    ), patch(
+        "homeassistant.components.kulersky.async_setup", return_value=True
+    ) as mock_setup, patch(
+        "homeassistant.components.kulersky.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {},
+        )
+
+    assert result2["type"] == "abort"
+    assert result2["reason"] == "no_devices_found"
+    await hass.async_block_till_done()
+    assert len(mock_setup.mock_calls) == 0
+    assert len(mock_setup_entry.mock_calls) == 0
+
+
+async def test_flow_exceptions_caught(hass):
+    """Test we get the form."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    assert result["type"] == "form"
+    assert result["errors"] is None
+
+    with patch(
+        "homeassistant.components.kulersky.config_flow.pykulersky.discover_bluetooth_devices",
+        side_effect=pykulersky.PykulerskyException("TEST"),
+    ), patch(
+        "homeassistant.components.kulersky.async_setup", return_value=True
+    ) as mock_setup, patch(
+        "homeassistant.components.kulersky.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {},
+        )
+
+    assert result2["type"] == "abort"
+    assert result2["reason"] == "no_devices_found"
+    await hass.async_block_till_done()
+    assert len(mock_setup.mock_calls) == 0
+    assert len(mock_setup_entry.mock_calls) == 0
diff --git a/tests/components/kulersky/test_light.py b/tests/components/kulersky/test_light.py
new file mode 100644
index 00000000000..1b2472d7d7f
--- /dev/null
+++ b/tests/components/kulersky/test_light.py
@@ -0,0 +1,315 @@
+"""Test the Kuler Sky lights."""
+import asyncio
+
+import pykulersky
+import pytest
+
+from homeassistant import setup
+from homeassistant.components.kulersky.light import DOMAIN
+from homeassistant.components.light import (
+    ATTR_BRIGHTNESS,
+    ATTR_HS_COLOR,
+    ATTR_RGB_COLOR,
+    ATTR_WHITE_VALUE,
+    ATTR_XY_COLOR,
+    SCAN_INTERVAL,
+    SUPPORT_BRIGHTNESS,
+    SUPPORT_COLOR,
+    SUPPORT_WHITE_VALUE,
+)
+from homeassistant.const import (
+    ATTR_ENTITY_ID,
+    ATTR_FRIENDLY_NAME,
+    ATTR_SUPPORTED_FEATURES,
+    STATE_OFF,
+    STATE_ON,
+    STATE_UNAVAILABLE,
+)
+import homeassistant.util.dt as dt_util
+
+from tests.async_mock import MagicMock, patch
+from tests.common import MockConfigEntry, async_fire_time_changed
+
+
+@pytest.fixture
+async def mock_entry(hass):
+    """Create a mock light entity."""
+    return MockConfigEntry(domain=DOMAIN)
+
+
+@pytest.fixture
+async def mock_light(hass, mock_entry):
+    """Create a mock light entity."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+
+    light = MagicMock(spec=pykulersky.Light)
+    light.address = "AA:BB:CC:11:22:33"
+    light.name = "Bedroom"
+    light.connected = False
+    with patch(
+        "homeassistant.components.kulersky.light.pykulersky.discover_bluetooth_devices",
+        return_value=[
+            {
+                "address": "AA:BB:CC:11:22:33",
+                "name": "Bedroom",
+            }
+        ],
+    ):
+        with patch(
+            "homeassistant.components.kulersky.light.pykulersky.Light"
+        ) as mockdevice, patch.object(light, "connect") as mock_connect, patch.object(
+            light, "get_color", return_value=(0, 0, 0, 0)
+        ):
+            mockdevice.return_value = light
+            mock_entry.add_to_hass(hass)
+            await hass.config_entries.async_setup(mock_entry.entry_id)
+            await hass.async_block_till_done()
+
+        assert mock_connect.called
+        light.connected = True
+
+        yield light
+
+
+async def test_init(hass, mock_light):
+    """Test platform setup."""
+    state = hass.states.get("light.bedroom")
+    assert state.state == STATE_OFF
+    assert state.attributes == {
+        ATTR_FRIENDLY_NAME: "Bedroom",
+        ATTR_SUPPORTED_FEATURES: SUPPORT_BRIGHTNESS
+        | SUPPORT_COLOR
+        | SUPPORT_WHITE_VALUE,
+    }
+
+    with patch.object(hass.loop, "stop"), patch.object(
+        mock_light, "disconnect"
+    ) as mock_disconnect:
+        await hass.async_stop()
+        await hass.async_block_till_done()
+
+    assert mock_disconnect.called
+
+
+async def test_discovery_lock(hass, mock_entry):
+    """Test discovery lock."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+
+    discovery_finished = None
+    first_discovery_started = asyncio.Event()
+
+    async def mock_discovery(*args):
+        """Block to simulate multiple discovery calls while one still running."""
+        nonlocal discovery_finished
+        if discovery_finished:
+            first_discovery_started.set()
+            await discovery_finished.wait()
+        return []
+
+    with patch(
+        "homeassistant.components.kulersky.light.pykulersky.discover_bluetooth_devices",
+        return_value=[],
+    ), patch(
+        "homeassistant.components.kulersky.light.async_track_time_interval",
+    ) as mock_track_time_interval:
+        mock_entry.add_to_hass(hass)
+        await hass.config_entries.async_setup(mock_entry.entry_id)
+        await hass.async_block_till_done()
+
+        with patch.object(
+            hass, "async_add_executor_job", side_effect=mock_discovery
+        ) as mock_run_discovery:
+            discovery_coroutine = mock_track_time_interval.call_args[0][1]
+
+            discovery_finished = asyncio.Event()
+
+            # Schedule multiple discoveries
+            hass.async_create_task(discovery_coroutine())
+            hass.async_create_task(discovery_coroutine())
+            hass.async_create_task(discovery_coroutine())
+
+            # Wait until the first discovery call is blocked
+            await first_discovery_started.wait()
+
+            # Unblock the first discovery
+            discovery_finished.set()
+
+            # Flush the remaining jobs
+            await hass.async_block_till_done()
+
+            # The discovery method should only have been called once
+            mock_run_discovery.assert_called_once()
+
+
+async def test_discovery_connection_error(hass, mock_entry):
+    """Test that invalid devices are skipped."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+
+    light = MagicMock(spec=pykulersky.Light)
+    light.address = "AA:BB:CC:11:22:33"
+    light.name = "Bedroom"
+    light.connected = False
+    with patch(
+        "homeassistant.components.kulersky.light.pykulersky.discover_bluetooth_devices",
+        return_value=[
+            {
+                "address": "AA:BB:CC:11:22:33",
+                "name": "Bedroom",
+            }
+        ],
+    ):
+        with patch(
+            "homeassistant.components.kulersky.light.pykulersky.Light"
+        ) as mockdevice, patch.object(
+            light, "connect", side_effect=pykulersky.PykulerskyException
+        ):
+            mockdevice.return_value = light
+            mock_entry.add_to_hass(hass)
+            await hass.config_entries.async_setup(mock_entry.entry_id)
+            await hass.async_block_till_done()
+
+    # Assert entity was not added
+    state = hass.states.get("light.bedroom")
+    assert state is None
+
+
+async def test_remove_entry(hass, mock_light, mock_entry):
+    """Test platform setup."""
+    with patch.object(mock_light, "disconnect") as mock_disconnect:
+        await hass.config_entries.async_remove(mock_entry.entry_id)
+
+    assert mock_disconnect.called
+
+
+async def test_update_exception(hass, mock_light):
+    """Test platform setup."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+
+    with patch.object(
+        mock_light, "get_color", side_effect=pykulersky.PykulerskyException
+    ):
+        await hass.helpers.entity_component.async_update_entity("light.bedroom")
+    state = hass.states.get("light.bedroom")
+    assert state is not None
+    assert state.state == STATE_UNAVAILABLE
+
+
+async def test_light_turn_on(hass, mock_light):
+    """Test KulerSkyLight turn_on."""
+    with patch.object(mock_light, "set_color") as mock_set_color, patch.object(
+        mock_light, "get_color", return_value=(255, 255, 255, 255)
+    ):
+        await hass.services.async_call(
+            "light",
+            "turn_on",
+            {ATTR_ENTITY_ID: "light.bedroom"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+    mock_set_color.assert_called_with(255, 255, 255, 255)
+
+    with patch.object(mock_light, "set_color") as mock_set_color, patch.object(
+        mock_light, "get_color", return_value=(50, 50, 50, 255)
+    ):
+        await hass.services.async_call(
+            "light",
+            "turn_on",
+            {ATTR_ENTITY_ID: "light.bedroom", ATTR_BRIGHTNESS: 50},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+    mock_set_color.assert_called_with(50, 50, 50, 255)
+
+    with patch.object(mock_light, "set_color") as mock_set_color, patch.object(
+        mock_light, "get_color", return_value=(50, 45, 25, 255)
+    ):
+        await hass.services.async_call(
+            "light",
+            "turn_on",
+            {ATTR_ENTITY_ID: "light.bedroom", ATTR_HS_COLOR: (50, 50)},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+
+    mock_set_color.assert_called_with(50, 45, 25, 255)
+
+    with patch.object(mock_light, "set_color") as mock_set_color, patch.object(
+        mock_light, "get_color", return_value=(220, 201, 110, 180)
+    ):
+        await hass.services.async_call(
+            "light",
+            "turn_on",
+            {ATTR_ENTITY_ID: "light.bedroom", ATTR_WHITE_VALUE: 180},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+    mock_set_color.assert_called_with(50, 45, 25, 180)
+
+
+async def test_light_turn_off(hass, mock_light):
+    """Test KulerSkyLight turn_on."""
+    with patch.object(mock_light, "set_color") as mock_set_color, patch.object(
+        mock_light, "get_color", return_value=(0, 0, 0, 0)
+    ):
+        await hass.services.async_call(
+            "light",
+            "turn_off",
+            {ATTR_ENTITY_ID: "light.bedroom"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+    mock_set_color.assert_called_with(0, 0, 0, 0)
+
+
+async def test_light_update(hass, mock_light):
+    """Test KulerSkyLight update."""
+    utcnow = dt_util.utcnow()
+
+    state = hass.states.get("light.bedroom")
+    assert state.state == STATE_OFF
+    assert state.attributes == {
+        ATTR_FRIENDLY_NAME: "Bedroom",
+        ATTR_SUPPORTED_FEATURES: SUPPORT_BRIGHTNESS
+        | SUPPORT_COLOR
+        | SUPPORT_WHITE_VALUE,
+    }
+
+    # Test an exception during discovery
+    with patch.object(
+        mock_light, "get_color", side_effect=pykulersky.PykulerskyException("TEST")
+    ):
+        utcnow = utcnow + SCAN_INTERVAL
+        async_fire_time_changed(hass, utcnow)
+        await hass.async_block_till_done()
+
+    state = hass.states.get("light.bedroom")
+    assert state.state == STATE_UNAVAILABLE
+    assert state.attributes == {
+        ATTR_FRIENDLY_NAME: "Bedroom",
+        ATTR_SUPPORTED_FEATURES: SUPPORT_BRIGHTNESS
+        | SUPPORT_COLOR
+        | SUPPORT_WHITE_VALUE,
+    }
+
+    with patch.object(
+        mock_light,
+        "get_color",
+        return_value=(80, 160, 200, 240),
+    ):
+        utcnow = utcnow + SCAN_INTERVAL
+        async_fire_time_changed(hass, utcnow)
+        await hass.async_block_till_done()
+
+    state = hass.states.get("light.bedroom")
+    assert state.state == STATE_ON
+    assert state.attributes == {
+        ATTR_FRIENDLY_NAME: "Bedroom",
+        ATTR_SUPPORTED_FEATURES: SUPPORT_BRIGHTNESS
+        | SUPPORT_COLOR
+        | SUPPORT_WHITE_VALUE,
+        ATTR_BRIGHTNESS: 200,
+        ATTR_HS_COLOR: (200, 60),
+        ATTR_RGB_COLOR: (102, 203, 255),
+        ATTR_WHITE_VALUE: 240,
+        ATTR_XY_COLOR: (0.184, 0.261),
+    }