just as a fyi, a ‘fix’ has just been made so the sliders can’t turn-off the lights any longer. I use the quotes because im my experience this is an unfortunate decision. It was made however…
I use a setup for my Hue scenes, and created an extra ‘off’ scene so I can use that in the same card:
id be glad to share it you want, though it might probably be on the community elsewhere for some time 
found it: Hue scenes mimicked in Ha (and on Buttons, was Tiles) though I changed my current code somewhat, this will give you an idea.