Timer slider for lights off

Configuration
13

FYI, Check out this post to see how to properly post a code-block.

The example given above had some errors which I commented on. Your own should look something like this:

- alias: auto_light_timer
  trigger:
  - platform: state
    entity_id: light.vtaklampa
    to: 'on'
  action:
  - wait_template: '{{ is_state("trigger.entity_id", "off") }}'
    timeout: '{{ (states("input_number.light_timer_minutes") | float * 60.0) | int }}'
    continue_on_timeout: true
  - condition: template
    value_template: '{{ is_state("trigger.entity_id", "on") }}'
  - service: homeassistant.turn_off
    data:
      entity_id: '{{ trigger.entity_id }}'