diff --git a/src/mash/bridges/hue/hue_bridge.py b/src/mash/bridges/hue/hue_bridge.py
index 3755b55..fcad9cc 100644
--- a/src/mash/bridges/hue/hue_bridge.py
+++ b/src/mash/bridges/hue/hue_bridge.py
@@ -27,7 +27,8 @@ class HueBridge(Bridge):
         for _ in range(self._retry_limit):
             try:
                 self._hue.connect()
-                break
+                logging.info(f"Connected to Hue Bridge [{self.id}].")
+                return
             except Exception as e:
                 logging.exception(
                     f"Failed to connect to Hue bridge [ip {self._hue.ip}]. Retrying in [{self._retry_timeout_seconds}] seconds.",
@@ -35,7 +36,9 @@ class HueBridge(Bridge):
                 )
                 sleep(self._retry_timeout_seconds)
 
-        logging.info(f"Connected to Hue Bridge [{self.id}].")
+        logging.error(
+            f"Unable to connect to Hue bridge [{self.id}]. Retry count exceeded [{self._retry_limit}]."
+        )
 
     @property
     def is_connected(self) -> bool | None:
@@ -54,6 +57,18 @@ class HueBridge(Bridge):
                 return scene
         return None
 
+    def set_light(self, lights, command):
+        return self._hue.set_light(lights, command)
+
+    def get_light(self, id, command=None):
+        return self._hue.get_light(id, command)
+
+    def set_group(self, groups, command):
+        return self._hue.set_group(groups, command)
+
+    def get_group(self, id, command=None):
+        return self._hue.get_group(id, command)
+
     def in_room_activate_scene(self, room_name: str, scene_name: str):
         """Activate a scene in a room.
 
diff --git a/src/mash/bridges/hue/hue_light.py b/src/mash/bridges/hue/hue_light.py
new file mode 100644
index 0000000..132dcda
--- /dev/null
+++ b/src/mash/bridges/hue/hue_light.py
@@ -0,0 +1,13 @@
+from mash.core.entities.light import Light
+from mash.core.utilities.glow import Glow
+
+
+class HueLight(Light):
+    def __init__(
+        self, *, id: str, name: str, room: str, groups: list[str] = ...
+    ) -> None:
+        super().__init__(id=id, name=name, room=room, groups=groups)
+
+    def __on_change__(self, current_on: bool, current_glow: Glow):
+        pass
+        # TODO: Requires reference to bridge
diff --git a/src/mash/core/__init__.py b/src/mash/core/__init__.py
index ed333cb..3c07599 100644
--- a/src/mash/core/__init__.py
+++ b/src/mash/core/__init__.py
@@ -1,5 +1,3 @@
+from .entities import *
 from .bridge import Bridge, BridgeException
-from .entity import Entity
-from .group import Group
-from .home import Home
 from .feature import Feature
diff --git a/src/mash/core/entities/__init__.py b/src/mash/core/entities/__init__.py
new file mode 100644
index 0000000..2aef817
--- /dev/null
+++ b/src/mash/core/entities/__init__.py
@@ -0,0 +1,6 @@
+from .entity import Entity
+from .group import Group
+from .home import Home
+from .contact_sensor import ContactSensor
+from .light import Light
+from .device_type import DeviceTypes
diff --git a/src/mash/core/entities/contact_sensor.py b/src/mash/core/entities/contact_sensor.py
new file mode 100644
index 0000000..b8710aa
--- /dev/null
+++ b/src/mash/core/entities/contact_sensor.py
@@ -0,0 +1,21 @@
+from mash.core.entities.device_type import DeviceType
+from mash.core.entities.entity import Entity
+
+
+class ContactSensor(Entity):
+    def __init__(
+        self, *, id: str, name: str, room: str, groups: list[str] = ...
+    ) -> None:
+        super().__init__(
+            id=id,
+            name=name,
+            room=room,
+            device_type=DeviceType.CONTACT_SENSOR,
+            groups=groups,
+        )
+        self._has_contact: bool = False
+
+    def is_closed(self) -> bool:
+        return self._has_contact
+
+    # TODO: Update state
diff --git a/src/mash/core/entities/device_type.py b/src/mash/core/entities/device_type.py
new file mode 100644
index 0000000..ea992d2
--- /dev/null
+++ b/src/mash/core/entities/device_type.py
@@ -0,0 +1,6 @@
+from enum import Enum
+
+
+class DeviceType(Enum):
+    LIGHT = "light"
+    CONTACT_SENSOR = "contact_sensor"
diff --git a/src/mash/core/entity.py b/src/mash/core/entities/entity.py
similarity index 73%
rename from src/mash/core/entity.py
rename to src/mash/core/entities/entity.py
index 317980b..a60252a 100644
--- a/src/mash/core/entity.py
+++ b/src/mash/core/entities/entity.py
@@ -1,6 +1,15 @@
+from mash.core.entities.device_type import DeviceType
+
+
 class Entity:
     def __init__(
-        self, *, id: str, name: str, room: str, device_type: str, groups: list[str] = []
+        self,
+        *,
+        id: str,
+        name: str,
+        room: str,
+        device_type: DeviceType,
+        groups: list[str] = [],
     ) -> None:
         self._id = id
         self._name = name
@@ -21,7 +30,7 @@ class Entity:
         return self._room
 
     @property
-    def device_type(self) -> str:
+    def device_type(self) -> DeviceType:
         return self._device_type
 
     @property
diff --git a/src/mash/core/group.py b/src/mash/core/entities/group.py
similarity index 97%
rename from src/mash/core/group.py
rename to src/mash/core/entities/group.py
index e270749..dc71146 100644
--- a/src/mash/core/group.py
+++ b/src/mash/core/entities/group.py
@@ -1,4 +1,4 @@
-from mash.core.entity import Entity
+from mash.core.entities.entity import Entity
 from fnmatch import fnmatch
 
 
diff --git a/src/mash/core/home.py b/src/mash/core/entities/home.py
similarity index 59%
rename from src/mash/core/home.py
rename to src/mash/core/entities/home.py
index 6dda77d..de86912 100644
--- a/src/mash/core/home.py
+++ b/src/mash/core/entities/home.py
@@ -1,5 +1,5 @@
-from mash.core.entity import Entity
-from mash.core.group import Group
+from mash.core.entities.entity import Entity
+from mash.core.entities.group import Group
 
 
 class Home(Group):
diff --git a/src/mash/core/entities/light.py b/src/mash/core/entities/light.py
new file mode 100644
index 0000000..cf9190a
--- /dev/null
+++ b/src/mash/core/entities/light.py
@@ -0,0 +1,66 @@
+from mash.core.entities.device_type import DeviceType
+from mash.core.entities.entity import Entity
+from mash.core.utilities.glow import Glow
+from mash.core.utilities.validation import clip_int
+
+
+class Light(Entity):
+    def __init__(
+        self, *, id: str, name: str, room: str, groups: list[str] = ...
+    ) -> None:
+        super().__init__(
+            id=id, name=name, room=room, device_type=DeviceType.LIGHT, groups=groups
+        )
+        self._glow: Glow = Glow()
+        self._on: bool = False
+
+    def __on_change__(self, current_on: bool, current_glow: Glow):
+        pass
+
+    def __check_for_change__(self, obj, prop, new_value):
+        old_value = getattr(obj, prop)
+        if old_value == new_value:
+            return
+
+        setattr(obj, prop, new_value)
+        self.__on_change__(current_on=self.on, current_glow=self._glow)
+
+    @property
+    def on(self) -> bool:
+        """True, if light is emitting glow. False, if light is off."""
+        return self._on
+
+    @on.setter
+    def on(self, value: bool):
+        """True, if light is emitting glow. False, if light is off."""
+        self.__check_for_change__(self, "_on", value)
+
+    @property
+    def brightness(self) -> int:
+        """Brightness in the range [0, 254]."""
+        return self._glow.brightness
+
+    @brightness.setter
+    def brightness(self, value: int):
+        """Brightness in the range [0, 254]. Value will be clipped."""
+        self.__check_for_change__(self._glow, "brightness", clip_int(value, 0, 254))
+
+    @property
+    def saturation(self) -> int:
+        """Saturation in the range [0, 254]."""
+        return self._glow.saturation
+
+    @saturation.setter
+    def saturation(self, value: int):
+        """Saturation in the range [0, 254]. Value will be clipped."""
+        self.__check_for_change__(self._glow, "saturation", clip_int(value, 0, 254))
+
+    @property
+    def hue(self) -> int:
+        """Hue in the range [0, 65535]."""
+        return self._glow.hue
+
+    @hue.setter
+    def hue(self, value: int):
+        """Hue in the range [0, 65535]. Value will be clipped."""
+        self.__check_for_change__(self._glow, "hue", clip_int(value, 0, 65535))
diff --git a/src/mash/core/utilities/__init__.py b/src/mash/core/utilities/__init__.py
new file mode 100644
index 0000000..bb8ee04
--- /dev/null
+++ b/src/mash/core/utilities/__init__.py
@@ -0,0 +1,2 @@
+from .glow import Glow
+from .validation import clip_int
diff --git a/src/mash/core/utilities/glow.py b/src/mash/core/utilities/glow.py
new file mode 100644
index 0000000..b0ff3b7
--- /dev/null
+++ b/src/mash/core/utilities/glow.py
@@ -0,0 +1,39 @@
+class Glow:
+    """Concept of colored light-rays."""
+
+    def __init__(
+        self, *, brightness: int = 0, saturation: int = 0, hue: int = 0
+    ) -> None:
+        self._brightness: int = brightness
+        self._saturation: int = saturation
+        self._hue: int = hue
+
+    @property
+    def brightness(self) -> int:
+        """Brightness in the range [0, 254]."""
+        return self._brightness
+
+    @brightness.setter
+    def brightness(self, value: int):
+        """Brightness in the range [0, 254]."""
+        self._brightness = value
+
+    @property
+    def saturation(self) -> int:
+        """Saturation in the range [0, 254]."""
+        return self._saturation
+
+    @saturation.setter
+    def saturation(self, value: int):
+        """Saturation in the range [0, 254]."""
+        self._saturation = value
+
+    @property
+    def hue(self) -> int:
+        """Hue in the range [0, 65535]."""
+        return self._hue
+
+    @hue.setter
+    def hue(self, value: int):
+        """Hue in the range [0, 65535]."""
+        self._hue = value
diff --git a/src/mash/core/utilities/validation.py b/src/mash/core/utilities/validation.py
new file mode 100644
index 0000000..7b85365
--- /dev/null
+++ b/src/mash/core/utilities/validation.py
@@ -0,0 +1,2 @@
+def clip_int(value, min_val: int, max_val: int) -> int:
+    return min([max([int(value), min_val]), max_val])