Button to turn lights off (call scene)

Configuration
1

Been looking around and found the folowing code whithc I think does what I want

type: button
entity: scene.morning_full_lights
name: Full brightness v2
tap_action:
  action: call-service
  service: scene.turn_on
  service_data:
    entity_id: scene.morning_full_lights

I have a scene called bedroom.lights.off whitch I want to call when the button is pressed.

Soemthing like this

show_name: false
show_icon: true
type: button
entity: scene.bedroom_lights_off
show_state: false
icon: mdi:lightbulb-multiple-off-outline
tap_action:
  action: call-service
  service: scene.bedroom.lights.off

I know this is not corect.

I dont know why it insists on calling the entity scene.bedroom_lights_off, if I changes this it errors. Its not the name of the scene, ime confused.

Problem is I dont really what things like entity and entity_id are. Can someone porint me at the corect docs, its all a bit overwelming.