group:
  simulation_lights_all:
    name: Simulation Lights (All)
    entities:
      - group.downstairs_flat_lights # ← now valid here
      - switch.esp_centralstairs_top_relay_2_stair_footer_lights
      - switch.esp_centralstairs_bottom_relay_1_main_stair_lights_lower
      - switch.esp_entrancebathrmlights_relay_1_main_lights
      - switch.esp_entrancelightswitch_relay_1_entrance_lights
      - switch.esp_mainkitchenlights_relay_1_main_lights
      - switch.esp_mainkitchenlights_relay_2_benchtop_lights
      - switch.main_hallway_lightswitch_tasmo_ks811s_2940_hallway_1a
      - switch.tasmo_ks811t_0702_lounge_3a
      - switch.tasmo_ks811t_0702_lounge_3b
      - switch.tasmo_ks811t_0702_lounge_3c