Engineering News 17 January 2011.

South Africa has saved 1 800 MW of electricity – enough to power a city the size of Durban – through retrofitting power-guzzling incandescent bulbs with energy savers, power utility Eskom said on Monday…

http://www.engineeringnews.co.za/article/sa-saves-1-800-mw-through-energy-efficient-lighting-eskom-2011-01-17