Interesting Question of the Day – 24 December 2021

If you have 500 LED Christmas lights that are on for 5 hours per day for the whole month of December, how much would the electricity to keep them on for the Christmas season cost you?

Would it be 26c, $2.60, or $26?

The first new player to comment on the website with the correct answer wins a free drink at their next iQ Trivia show.

2 thoughts on “Interesting Question of the Day – 24 December 2021

  1. If each LED uses 1/5 Watt, the load for 500 would be 100 W. For the 155 hours they were on the total energy consumption would be 15.5 kWh. Allow a little extra for auxiliaries (A transformer?) we would see about 17 kWh. At a cost of 15cents/kWh, the month’s cost would be 255 cents or $2.55.
    Note that my estimates of LED losses and Australian utility costs could be out a little but probably not by a factor of 10, so $2.60 is my estimate.

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