Trigger with all motion sensors in the area

Configuration
9

You can get rid of the namespace and loop by using a select filter:

{% set area = area_name(trigger.entity_id) %}
{{ area_entities(area ) | select('match, 'light.') | list }}

But @Ben1983, you can also just use the Area ID in the light.turn_on action:

action: light.turn_on
target:
  area_id: "{{ area_id(trigger.entity_id) }}"

Just be aware that applying actions across an entire Area can sometimes have unintended consequences. Some integrations and/or manufacturers will create light entities for things that you may not expect to be affected by your attempt to turn off room lights. These include indicator LEDs and screens/monitors.

Personally, I use Labels to mark lights that should be considered room lights for this type of automation.

Also, please follow Community Guidelines #14 and #11 by posting automations as YAML configuration, not screenshots.

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