I don't actually own a Waldorf ring. It's on my to-do list to make one (someday...), but the idea of candles specifically designed to fit into Waldorf rings wasn't even on my radar until several customers asked me for them.
And now I FINALLY have a full set of Waldorf ring candles listed:
The lighting isn't quite what I'd like with these--it can be VERY hard to accurately render such a wide variety of colors--but you do your best and move on, you know? If I decide later that I simply can no longer live with the purple tint to the photos, then I'll reshoot, but I'm surprised at how much I can live with if the alternative is putting forth a great deal more effort.