Mairangi Bay mixes established coastal properties, family homes that have been renovated once or twice, and modern architectural builds. That mix shows up in the wiring. A house that has had three sets of hands in it over forty years rarely has one tidy story behind its circuits, and tracing a fault in one is a different job from tracing a fault in a house that was built in one go.
The other thing that shapes electrical work here is the air. Salt carries a long way inland off this stretch of coast, and it is hardest on the seaward side of a property. It works into fixings, glands and lamp holders, so an exterior fitting that would last for years further inland can fail early here. Choosing fittings that suit the exposure, and checking them before they fail rather than after, is most of the difference between a lighting scheme that lasts and one that gets replaced.