A simple timer light blueprint for home assistant

timer_light.yaml

blueprint:
  name: Timer Light
  description: Turn off a light when after a specified amount of time has passed
  domain: automation
  source_url: https://gist.github.com/PProvost/35ded78f74c31a74419f2aa900bfb7ad
  input:
    light_target:
      name: Light
      selector:
        target:
          entity:
            domain: light
    wait_time:
      name: Wait time
      description: Time to wait before turning the light off
      default: 300 # 5m default
      selector:
        number:
          min: 0
          max: 3600
          unit_of_measurement: seconds
    active_start_time:
      name: Active start time
      description: "[Optional] Beginning of time period when this is active"
      default: "00:00:00"
      selector:
        time:
    active_end_time:
      name: Active end time
      description: "[Optional] End of time period when this is active"
      default: "23:59:59"
      selector:
        time:
mode: restart # If the trigger is detected while running, restart the script.
max_exceeded: silent

trigger:
  platform: state
  entity_id: !input light_target
  to: "on"
  for: !input wait_time

action:
  - service: homeassistant.turn_off
    target: !input light_target