Lovelace card that shows all the lights in a light group

I have a lot of light groups defined and would love to show an entity row for each light so you can control them individually if you want.

I have lovelace-gen installed and had a try of this code, but it didn’t want to work - wondering if anyone knows of a card or a way to make this work?

  - type: entities
      {% for l in states.light[entity].attributes.entity_id %}
        - {{ l }}
      {% endfor %}

In the above example, entity is set to the name of a light group (this works in scripts and the dev tools template editor).

Within lovelace, it just shows “unknown error”.

thanks in advance