Gerke, Brian F, Allison T Ngo, and Kibret S Fisseha. Recent price trends and learning curves for household LED lamps from a regression analysis of Internet retail data. 2015.PDF
Gerke, Brian F, Allison T Ngo, Andrea L Alstone, and Kibret S Fisseha. The Evolving Price of Household LED Lamps: Recent Trends and Historical Comparisons for the US Market. Berkeley, CA: Lawrence Berkeley National Laboratory, 2014.PDF