Christmas Lights Webquest
How does the type of circuit affect the strand of Christmas light with a burned out bulb?
Independent-Series & Parallel
If the Christmas lights are arranged in a parallel circuit then when
1 bulb bursts the other bulbs light up.
when you don't take any bulbs out they all light up, but if you take one off then it doesn't light up.
A parallel series is the best for Christmas lights. It works because ir will light all if them instead of only one.