Changing that light bulb - no big deal?

Lester Brown reports that shifting to CFLs in homes, to the most advanced linear fluorescents in office buildings, commercial outlets, and factories, and to LEDs in traffic lights would cut the world share of electricity used for lighting from 19 percent to 7 percent. This would save enough electricity to close 705 of the world's 2,670 coal-fired plants. (See data.)

That's more than 1/4 of all the coal plants in the world. 

That's a pretty big deal!