Why can't I find the light bulbs I want anymore?

From Yahoo News:   After January 1, 2014, it’ll be hard to find 60 and 40 watt light bulbs on the shelves. Why? Because legally, none will be allowed to be made. It’s all due to an efficiency standard, signed by President Bush back in 2007. However, stores will still be able to sell off what they have in stock. In 2012, all 100 watt bulbs were phased out and 75 watts went bye-bye this year.