Probably not: As it turns out, only two people did.

Our third energy efficiency trivia question of the year, posted yesterday, asked: According to ENERGY STAR, if every American home replaced just one light bulb with an ENERGY STAR-certified replacement, how much would America save on energy bills?

(About an hour after the question went live, we added a clarification, noting that we were looking for the amount the entire country would save in annual energy costs if every home swapped in an ENERGY STAR bulb. Many of our guessers guessed the amount saved by a single bulb, which is great, but not what we were looking for.)

The answer, according to ENERGY STAR: $566 million. (You can see the info here.)

We’ve chosen a winner at random and have notified that person through email. Our next energy efficiency trivia question is currently scheduled for Sept. 25, so tune in then for another chance to win!