For this reason, the proportion of resources that we expend on lighting has remained virtually unchanged for the past three centuries, at about 0.72% of gross domestic product. As Saunders and his colleagues observe in their journal article, “This was the case in the UK in 1700, is the case in the undeveloped world not on grid electricity in modern times, and is the case for the developed world in modern times using the most advanced lighting technologies.”
正因为如此，我们用在照明方面的能耗比例在过去300年间几乎没有任何变化，一直占国内生产总值的0.72%左右。 就像桑德斯及其同僚在期刊论文中总结的那样，“18世纪的英国是这种情况，尚未建成现代电网的不发达国家是这种情况，使用最先进照明技术的现代发达国家也是这种情况。”