# Bulbs

## Supported features

- Turning on and off

- Setting brightness, color temperature, and color (in HSV)

- Querying emeter information

- Transitions

- Presets

## Currently unsupported

- Setting the default transitions

- Timers

Note

Feel free to open a pull request to add support for more features!

## Transitions

All commands changing the bulb state can be accompanied with a transition, e.g., to slowly fade the light off. The transition time is in milliseconds, 0 means immediate change. If no transition value is given, the default setting as configured for the bulb will be used.

Note

Accepted values are command (and potentially bulb) specific, feel free to improve the documentation on accepted values.

Example: While KL130 allows at least up to 15 second transitions for smooth turning off transitions, turning it on will not be so smooth.

## Command-line usage

All command-line commands can be used with transition period for smooth changes.

Example: Turn the bulb off over a 15 second time period.

    $ kasa --type bulb --host <host> off --transition 15000

Example: Change the bulb to red with 20% brightness over 15 seconds:

    $ kasa --type bulb --host <host> hsv 0 100 20 --transition 15000

## API documentation

class kasa.iot.iotbulb.BehaviorMode(*values)

  Enum to present type of turn on behavior.

  Circadian = 'circadian'

    Circadian

  Last = 'last_status'

    Return to the last state known state.

  Preset = 'customize_preset'

    Use chosen preset.

class kasa.iot.iotbulb.TurnOnBehaviors(soft: Annotated[TurnOnBehavior, Alias(name='soft_on')], hard: Annotated[TurnOnBehavior, Alias(name='hard_on')])

  Model to contain turn on behaviors.

  hard: Annotated[TurnOnBehavior, Alias(name='hard_on')]

    The behavior when the bulb has been off from mains power.

  soft: Annotated[TurnOnBehavior, Alias(name='soft_on')]

    The behavior when the bulb is turned on programmatically.

class kasa.iot.iotbulb.TurnOnBehavior(mode: BehaviorMode, preset: Annotated[int | None, Alias(name='index')] = None, brightness: int | None = None, color_temp: int | None = None, hue: int | None = None, saturation: int | None = None)

  Model to present a single turn on behavior.

  Parameters:

    - preset (int) – the index number of wanted preset.

    - mode (BehaviorMode) – last status or preset mode. If you are changing existing settings, you should not set this manually.

  To change the behavior, it is only necessary to change the `preset` field to contain either the preset index, or `None` for the last known state.

  class Config

    Serialization config.

    omit_none: bool | Literal[Sentinel.MISSING] = True
    serialize_by_alias: bool | Literal[Sentinel.MISSING] = True
  brightness: int | None = None
  color_temp: int | None = None
  classmethod from_dict(d, *, dialect=None)
  hue: int | None = None
  mode: BehaviorMode

    Wanted behavior

  preset: Annotated[int | None, Alias(name='index')] = None

    Index of preset to use, or `None` for the last known state.

  saturation: int | None = None
  to_dict()