Change icon of lightgroups

Hello,

I created some light groups, like

light:

# -------------------------------------------
  - platform: group
    name: lightgroup - gang
    entities:
      - light.my_n00_gang_light_l07_hanglamp
      - light.my_n00_gang_light_l10_toilet
      - light.my_n01_gang_light_l06_hanglamp
      - light.my_n02_gang_light_l09_hanglamp

They appear in the interface as
2020-12-12_21-15-05

Can I change the icon of this group? Now it appears as a light_group, but I just want to display it as a single light.

kind regards,
B

FYI:
you can change the icon of a lightgroup in customize.yaml, i.e.:

  light.group_badkamer:
    friendly_name: "badkamer"
    icon: mdi:lightbulb-group
  light.group_badkamer_plafond:
    friendly_name: "badkamer plafond"
    icon: mdi:dome-light
  light.group_badkamer_spiegel:
    friendly_name: "badkamer spiegel"
    icon: mdi:mirror

2020-12-26_22-19-29