old_contents: """
  Support for ISY994 lights.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/light.isy994/
  """
  import logging
  from typing import Callable
  
  from homeassistant.components.light import Light, SUPPORT_BRIGHTNESS
  import homeassistant.components.isy994 as isy
  from homeassistant.const import STATE_ON, STATE_OFF, STATE_UNKNOWN
  from homeassistant.helpers.typing import ConfigType
  
  _LOGGER = logging.getLogger(__name__)
  
  VALUE_TO_STATE = {
      False: STATE_OFF,
      True: STATE_ON,
  }
  
  UOM = ['2', '51', '78']
  STATES = [STATE_OFF, STATE_ON, 'true', 'false', '%']
  
  
  # pylint: disable=unused-argument
  def setup_platform(hass, config: ConfigType,
                     add_devices: Callable[[list], None], discovery_info=None):
      """Set up the ISY994 light platform."""
      if isy.ISY is None or not isy.ISY.connected:
          _LOGGER.error('A connection has not been made to the ISY controller.')
          return False
  
      devices = []
  
      for node in isy.filter_nodes(isy.NODES, units=UOM,
                                   states=STATES):
          if node.dimmable or '51' in node.uom:
              devices.append(ISYLightDevice(node))
  
      add_devices(devices)
  
  
  class ISYLightDevice(isy.ISYDevice, Light):
      """Representation of an ISY994 light devie."""
  
      def __init__(self, node: object) -> None:
          """Initialize the ISY994 light device."""
          isy.ISYDevice.__init__(self, node)
  
      @property
      def is_on(self) -> bool:
          """Get whether the ISY994 light is on."""
          return self.state == STATE_ON
  
      @property
      def state(self) -> str:
          """Get the state of the ISY994 light."""
          return VALUE_TO_STATE.get(bool(self.value), STATE_UNKNOWN)
  
      def turn_off(self, **kwargs) -> None:
          """Send the turn off command to the ISY994 light device."""
          if not self._node.fastoff():
              _LOGGER.debug('Unable to turn on light.')
  
      def turn_on(self, brightness=100, **kwargs) -> None:
          """Send the turn on command to the ISY994 light device."""
          if not self._node.on(val=brightness):
              _LOGGER.debug('Unable to turn on light.')
  
      @property
      def supported_features(self):
          """Flag supported features."""
          return SUPPORT_BRIGHTNESS
  
new_contents: """
  Support for ISY994 lights.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/light.isy994/
  """
  import logging
  from typing import Callable
  
  from homeassistant.components.light import (
      Light, SUPPORT_BRIGHTNESS, ATTR_BRIGHTNESS)
  import homeassistant.components.isy994 as isy
  from homeassistant.const import STATE_ON, STATE_OFF, STATE_UNKNOWN
  from homeassistant.helpers.typing import ConfigType
  
  _LOGGER = logging.getLogger(__name__)
  
  VALUE_TO_STATE = {
      False: STATE_OFF,
      True: STATE_ON,
  }
  
  UOM = ['2', '51', '78']
  STATES = [STATE_OFF, STATE_ON, 'true', 'false', '%']
  
  
  # pylint: disable=unused-argument
  def setup_platform(hass, config: ConfigType,
                     add_devices: Callable[[list], None], discovery_info=None):
      """Set up the ISY994 light platform."""
      if isy.ISY is None or not isy.ISY.connected:
          _LOGGER.error('A connection has not been made to the ISY controller.')
          return False
  
      devices = []
  
      for node in isy.filter_nodes(isy.NODES, units=UOM,
                                   states=STATES):
          if node.dimmable or '51' in node.uom:
              devices.append(ISYLightDevice(node))
  
      add_devices(devices)
  
  
  class ISYLightDevice(isy.ISYDevice, Light):
      """Representation of an ISY994 light devie."""
  
      def __init__(self, node: object) -> None:
          """Initialize the ISY994 light device."""
          isy.ISYDevice.__init__(self, node)
  
      @property
      def is_on(self) -> bool:
          """Get whether the ISY994 light is on."""
          return self.state == STATE_ON
  
      @property
      def state(self) -> str:
          """Get the state of the ISY994 light."""
          return VALUE_TO_STATE.get(bool(self.value), STATE_UNKNOWN)
  
      def turn_off(self, **kwargs) -> None:
          """Send the turn off command to the ISY994 light device."""
          if not self._node.fastoff():
              _LOGGER.debug('Unable to turn on light.')
  
      def turn_on(self, brightness=100, **kwargs) -> None:
          """Send the turn on command to the ISY994 light device."""
          if not self._node.on(val=brightness):
              _LOGGER.debug('Unable to turn on light.')
  
      @property
      def state_attributes(self):
          """Flag supported attributes."""
          return {ATTR_BRIGHTNESS: self.value}
  
      @property
      def supported_features(self):
          """Flag supported features."""
          return SUPPORT_BRIGHTNESS
  
subject: add dimmer slide control to imported isy lights (#4152)