There's no time like the present to get yourself the best light bulb on the market. You've known about the benefits to the environment and your wallet for a while now when it comes to opting for a CFL or LED light bulb. And now - since Congress is phasing out the old fashioned Edison bulbs - you may as well make the switch to something kinder for the planet. Still not convinced? Download this handy guide (PDF) from the Natural Resources Defense Council. The cost savings are clear - those old bulbs are costing you about six times as much to operate over their lifetime.