If she has a choice and the wiring details are stated on the packaging, then Janelle should look for lights that are wired in parallel within the string, and she should avoid lights that are wired in series within the string.
If a single light in a parallel string fails, then only that one goes out. The rest of the lights in the string continue to shimmer and glimmer.
If a single light in a series string fails, then ALL of the lights in that string go out, and it's a substantial engineering challenge to determine which light actually failed.
Sample Response: Janelle should buy lights that are wired in parallel. The main advantage of lights wired in parallel is that if one bulb goes out, the rest of the bulbs will remain lit.
Without the fig, we know nothing about AB, C_1, C_2, V_a, or V_b. The probability of getting any kind of answer from anybody who hasn't seen or tasted the fig is vanishingly small.
