New Tile Card Control Two Lights one Brightness Slider

Hi I’m using the new tile card and trying to add two lights so I can control the brightness on both but what ever configuration I code i get mapping error is it possible to have two light entities using - Tile Card - Home Assistant

type: tile
entity: light.lightbulb_8
type: tile
entity: light.lightbulb_9
name: Desk Lamps
show_entity_picture: true
features:
  - type: light-brightness

You could create a light group with the two lights, and then use that in the tile card.
You can’t use 2 lights in one tile

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temporary solution would be to create a group in helper

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That does the trick thank you for your reply.