The characteristics of the circuits allows to find the result for the type of circuit is:
Electric circuits have two fundamental forms, see attached:
Series circuits are used for small and low voltage systems due to the serious drawback that if one element fails, the entire system stops.
In this case the lights are in a single line therefore there is only one path for the current to flow and it is an example of a series type circuit.
In conclusion using the characteristics of the circuits we can find the result for the type of circuit is:
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