The lightbulb as we know it may be a thing of the past. That's if California and Wal-Mart have anything to say about it. Oh, add in a California lawmaker and you have energy savings stew. California Assemblyman Lloyd Levine is expected to introduce legislation this week that would require the use of compact fluorescent lightbulbs (CFL) in California by 2012. Sounds like a great idea to me. Heck, even Wal-Mart plans to sell 100 million or so CFL's by the end of the year. According to the EPA, CFLs save money and energy...a 20-watt CFL gives as much light as a 75-watt conventional bulb...lasting up to 13 times longer. California Energy Commission member Arthur Rosenfeld said savings to residents who replace their traditional bulbs can be as much as $40 or $50 per year. Not much of an energy savings windfall when you consider home prices in California but taken in the aggregate, those energy savings could start to accumulate, especially given state or nationwide initiatives.