Christmas Lights

Why do some bulbs burn out and turn off the rest?

Does the wiring change the burned out bulb to turn off all or some

IV: lights   DV: burned out bulb

My hypothesis is if one bulb is burnt out on the lights the rest will go out

My observation is that they are on in this pattern

my observation is that the lights still work even one burnt out

My second Hypothesis is the lights won't work even with one burn out

These lights work all together

These lights do not work because one is burnt out

A series circuit is the best series to use for Christmas lights because when one burns out so does the rest and you can easily spot the one that is burnt out

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