[Kevin Darrah] recently went out to dinner at a restaurant that was using some cheap LED candles (yuck ... notice the patterns programmed into the fake flame repeat over and over again.

I thought they would look ugly and fake, which most flameless candles do, but they seem quite ... two AA batteries powering it up to create the flickering movement. The light that emits from ...

and the flicker he recorded from a candle flickr LED. It’s surprising how different the fake is from the real thing. You can look at his measurements and code at his github.