Looking at the rapidly flickering LED image I imagined an engineer showing the data to his manager, &quot;well, a real candle looks like this: kind of sedate and boring.&quot; Followed by the manager insisting that it gets a little livelier, saying something like, &quot;if people can&#x27;t see it flickering they&#x27;ll thing it&#x27;s broken. Make it very obvious that it flickers. I don&#x27;t care if it looks real. I care that people can tell it&#x27;s flickering&quot;