Thank you it is just beautiful and easy to use.
I have created a specific card for my ligths using custom:slider-card

light_buttons:
variables:
entity: "cover.fibaro_cover_balcon"
name: "Lumière"
styles:
card:
- border-radius: 20px
- box-shadow: var(--box-shadow)
- padding: 12px
grid:
- grid-template-areas: '"item1" "item2"'
- grid-template-columns: 1fr
- grid-template-rows: min-content min-content
- row-gap: 12px
custom_fields:
item1:
card:
entity: "[[[ return variables.entity ]]]"
name: "[[[ return variables.name ]]]"
tap_action:
action: call-service
service: light.toggle
service_data:
entity_id: "[[[ return variables.entity ]]]"
template:
- icon_info
- light
type: "custom:button-card"
item2:
card:
template: list_items_light
type: "custom:button-card"
custom_fields:
item1:
card:
type: custom:slider-card
entity: "[[[ return variables.entity ]]]"
radius: 14px
height: 42px
mainSliderColorOff: var(--google-grey-500)
secondarySliderColor: "rgba(var(--couleur-theme),0.05)"
secondarySliderColorOff: "rgba(var(--couleur-theme),0.05)"
thumbColorOff: white
item2:
card:
icon: "mdi:palette"
tap_action:
action: more-info
type: "custom:button-card"
entity: "[[[ return variables.entity ]]]"
template: widget_icon