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The incandescent light bulb’s days are numbered. Under federal law, the 100-watt bulbs are supposed to be taken off the shelf next year, followed later by the more common 40- and 60-watt models.


But guess who’s still using them? The Department of Energy.

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Huddler Bobkart developed a formula for computing the total (tangible) cost of ownership of light bulbs that takes into account the initial cost of the bulb, its energy consumption, its light output, its lifetime length, and the cost of electricity

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The iconic, compact fluorescent lightbulb is dead: meet its next generation replacements that are brighter, more efficient, longer-lasting, and mercury-free

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"Does the latest generation of energy-saving light bulbs save energy? A comprehensive study conducted by Osram, the German lighting company, provides evidence that they do.

While that may seem self-evident, until the release of the report on Monday the answer remained unclear."

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he ubiquitous but highly inefficient 60-watt light bulb badly needs a makeover. And it could be worth millions in government prize money — and more in government contracts — to the first company that figures out how to do it.

Right now, that company could be Philips, the Dutch electronics giant. The company announced on Thursday that it had submitted the first entry for the L Prize, an Energy Department contest that will award up to $10 million to the first person or group to create a new energy-sipping version of the most popular type of light bulb used in America.

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A European Union ban on the manufacture and import of 100-watt and frosted incandescent light bulbs, in use since the 19th century, has come into force.

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If a CFL bulb lasts for longer than 50hrs, then the total life cycle energy consumption of the CFL will be lower than that of an incandescent bulb even though they are more complicated to make.

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In China, however, a heavy environmental price is being paid for the production of “green” lightbulbs in cost-cutting factories.

Large numbers of Chinese workers have been poisoned by mercury, which forms part of the compact fluorescent lightbulbs. A surge in foreign demand, set off by a European Union directive making these bulbs compulsory within three years, has also led to the reopening of mercury mines that have ruined the environment.

mercury cfl compact fluorescent lightbulbs china greenmonktv