How to display all lights and some light switches on using entity filter?

[kcd (Kev)]

Maybe these?

Show lights that are on

I saw a video where someone was showing what they did with their Lovelace screens and on the main page they had a row of nothing. And then when they would turn on lights, it would show in that box of nothing. The more lights they turned on the more icons showed there. Then you could turn those lights off using the dynamic icons and when you turned each off they would go away from that screen. Any idea how to do that?

Enumerate all entity_ids of light domain to show all lights that are currently on using entity-filter card

Hi, I am trying to add a card to the UI, that shows all lights that are currently on (could also be "all open windows,…). I can achieve this simply by using the entity-filter card and manually adding a list of all my light entities. But I thought, there must be a more elegant and future-proof way. What I really want to spefify is “all entities of the light domain”. The forum posts PSA: Turn on/off all lights in Home Assistant 0.104+ (group.all_* changes) and How to say in message which windo…