The author got these neat looking LED lamps, but they used a standard LED, so he got some “flickering” LED’s off the net (seem to run $1 each) and replaced the existing ones with them to give them more cool look. Me, maybe cheaper to get the flicker LED out of those disposable LED candles. Still a nice build
https://www.instructables.com/Dragon-Lamp-Flicking-Flame-Modification/