Flash forward: The lightbulb
Lighting is changing fast. Incandescents as we know them are on the way out. It may be confusing for a while. But in the end, your wallet will thank you. And so will the planet. Here's a tour of the ever-burgeoning bulb.
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The watt bulb
Tungsten 75 watt bulb: Thomas Edison's stalwart for more than a century, it's cheap to buy, but expensive to use because it's inefficient. With national standards starting in 2012, it will change or be phased out.