I definitely misspoke, my bad. I mean that the cost, in terms of energy requirement, required to produce light is going down. Source: http://www.eia.gov/todayi

I definitely misspoke, my bad. I mean that the cost, in terms of energy requirement, required to produce light is going down. Source: http://www.eia.gov/todayinenergy/detail.cfm?id=15471 http://www.eia.gov/todayinenergy/detail.cfm?id=15471