However, this event has not been reproduced, and may have been due to some random unrelated event. Anything that plugs in, requires batteries, or is controlled by a switch would count. Be a little careful, though. Some switches have electromagnetic parts, and some are purely mechanical, so I don't know if that was a valid answer or not. The key here is to ask yourself why lighting strikes in one spot and not another.
Electrical charge tends to accumulate on some places and objects more easily than on others.
If lighting hits a spot, it is probably because that spot is favorable for lighting to strike, so it is likely that lightning will strike there again. There are several ways to get the answer. You are not given the power, but you are given the information you need to calculate it. Therefore, you need to take the information given, calculate kilowatts, then calculate the cost difference, then answer the question. Many of the things we take for granted today rely on things which had no known use when they were originally discovered and developed.