Re: Replacement bulbs with LED question
Just occasionally, I've noticed series arrangements of bulbs all being open circuit- I wondered if the first to go open circuit goes briefly into low-impedance metal-vapour arc mode, giving the remaining old and weak filaments a final kick-up that fractures them. This particular case is a low-voltage, low-energy situation though, so that seems unlikely.
More prosaically, a string of weary and time-served filaments might simply fracture if the device is dropped or heavily knocked.
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