The Breakthrough Institute recently highlighted on its blog some startling – and important – research findings along these lines, published in August in The Journal of Physics by energy economist Harry Saunders and four colleagues from the US Department of Energy’s Sandia National Laboratories. As Saunders noted in a summary on the blog, he and his colleagues, drawing on “300 years of evidence,” found that, “as lighting becomes more energy efficient, and thus cheaper, we use ever-more of it.”