Gradually increase light brightness to a target time, adjustable duration, start brightness, selectable weekdays

gradual_wakeup_lights.yaml

blueprint:
  name: Gradually Increase Brightness By Time
  description: >
    Lights turn on at a starting brightness, then ramp up natively
    (light.turn_on transition) to reach target brightness exactly at
    finish time. Duration adjustable.
  domain: automation
  input:
    target_lights:
      name: Lights
      selector:
        target:
          entity:
            domain: light
    finish_time:
      name: Finish time
      description: Time lights should reach target brightness.
      selector:
        time: {}
    duration:
      name: Duration (minutes)
      description: How long the ramp takes, ending at finish time.
      default: 15
      selector:
        number:
          min: 1
          max: 120
          unit_of_measurement: min
          mode: box
    start_brightness:
      name: Starting brightness
      description: Brightness lights turn on at before ramping up.
      default: 1
      selector:
        number:
          min: 1
          max: 100
          unit_of_measurement: "%"
          mode: slider
    target_brightness:
      name: Target brightness
      default: 100
      selector:
        number:
          min: 1
          max: 100
          unit_of_measurement: "%"
          mode: slider
    days_of_week:
      name: Days to run
      description: Days this automation is allowed to trigger.
      default: [mon, tue, wed, thu, fri, sat, sun]
      selector:
        select:
          multiple: true
          options:
            - label: Monday
              value: mon
            - label: Tuesday
              value: tue
            - label: Wednesday
              value: wed
            - label: Thursday
              value: thu
            - label: Friday
              value: fri
            - label: Saturday
              value: sat
            - label: Sunday
              value: sun

trigger:
  - platform: time_pattern
    minutes: "*"

variables:
  duration_raw: !input duration
  duration_min: "{{ duration_raw | int(15) }}"
  start_brightness_raw: !input start_brightness
  start_brightness: "{{ start_brightness_raw | int(1) }}"
  target_brightness_raw: !input target_brightness
  target_brightness: "{{ target_brightness_raw | int(100) }}"
  finish: !input finish_time

condition:
  - condition: time
    weekday: !input days_of_week
  - condition: template
    value_template: >
      {{ ((today_at(finish) - now()).total_seconds() | round | int
         - (duration_min * 60)) | abs <= 30 }}

action:
  - alias: Turn on at starting brightness
    service: light.turn_on
    target: !input target_lights
    data:
      brightness_pct: "{{ start_brightness }}"
      transition: 0
  - alias: Ramp up to target brightness by finish time
    service: light.turn_on
    target: !input target_lights
    data:
      brightness_pct: "{{ target_brightness }}"
      transition: "{{ duration_min * 60 }}"

mode: single