gistfile1.txt

{% set mystates = states|selectattr('entity_id', 'in', state_attr('light.all', 'entity_id')) |selectattr('state', 'equalto', 'on') | list %}
{% set names = mystates | map(attribute='name') | list %}
{% set times = mystates | map(attribute='last_updated') | list %}
{% for i in range(mystates | length) %}
{{ names[i] }} depuis ( {{ as_timestamp(times[i])|timestamp_custom("%Hh:%M") }} ),
{%- endfor %}

Une version pour voir, depuis combien de temps les lumières ont changés d'état !

{% set mystates = states|selectattr('entity_id', 'in', state_attr('light.all', 'entity_id')) |selectattr('state', 'equalto', 'on') | list %}
{% set names = mystates | map(attribute='name') | list %}
{% set times = mystates | map(attribute='last_changed') | list %}
{% for i in range(mystates | length) %}
{{ names[i] }} depuis {{ relative_time(times[i]) }},
{%- endfor %}