Congress has taken action to promote energy efficiency by banning incandescent lights. Despite the initial costs, and apprehension towards the new CFL or LED light bulbs, this mandate has caused the market to respond with some incredibly innovative products. Some of these new light bulbs consume less than 10% of the energy used with incandescent bulbs, and have a working life that is dramatically improved. Here is an article from Architectural Record and a slide show that highlights some of the new products that meet the energy efficiency standards:
http://archrecord.construction.com/products/ProductFocus/2012/1202-Light-Bulbs/