Should we wait for LED lights?

Many governments are banning the old incandescent light bulbs because of their inefficiency. The CFL (compact fluorescent light) is to replace it. Though in a perfect world, mercury entering the biosphere from discarded CFLs should be less than the mercury compounds produced by coal fired power plants, the LED seems promising in its even better efficiencies and lack of mercury compounds. Should governments wait until LEDs become cheaper before banning Edison's standard bulb? These bulbs can actually be made to have far greater lifespans, incidentally. What do you think. Any bright ideas?