Troubleshooting strategies for decorative lighting.

Compare and contrast troubleshooting strategies for decorative lighting.
Discuss the pros and cons of each configuration.
There are typically two kinds of circuits use in decorative lighting systems. The first, being series circuits which just conducts power to each light sequentially down the strand. The second, parallel circuits, is wired alternatingly so that if a few bulbs go out, it won't shut off power to the rest.