From Yahoo tech column:
Part I: Do Flat-Screen TVs Consume More Power? SHORT ANSWER IS YES
Tue Jan 2, 2007 6:47PM EST
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Why is it that there's no such thing as an easy answer to a simple question when it comes to technology? Over the warm holiday weekend we had one of those "green" discussions, as I'm sure so many of you did. The questions posed were simple: Are the new LCD and plasma displays more energy efficient than old CRT screens? And, which is more energy efficient: plasma or LCD? (I'll cover this question in part II of my post.)
The answer depends on many things, including how you use your TV, when you bought it, and—most of all—how TV power consumption is measured today.
First, the question of new flat-screen TVs versus old cathode-ray TVs. Generally speaking, large-screen TVs consume more energy than the smaller-screened CRT-based TVs they replace. And most people are adding TVs. That is, they tend not to replace old TVs with new ones but add a second or third TV. And since TVs consume power even when they're not on, just adding a TV set or two can add dramatically to your power consumption.
A recent report by the BBC found that in the United Kingdom, plasma televisions, which it says are about 50 percent bigger than their cathode-ray-tube equivalents, "consume about four times more energy according to the government-funded Energy Saving Trust." And when looking at the carbon emissions from the power plants, the same group found that old-style TVs produce 100kg of climate-warming C02 per year, while larger, plasma screens will pump out 400kg from the plant. A recent report from Panasonic, makers of both LCD and plasma TVs, said that the new TVs consume more power than older CRTs, but the company is working to get the new TVs to be more energy efficient as fast as it possibly can.
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As for compact flourescent light bulbs. I'm all for them but don't think that big brother should eliminate incandescents and force consumers to use a product that is potentially dangerous if it is shattered (mercury).
I personally use CFC bulbs because they save me money on my monthly electricity bill and if they cut down on pollution from coal fired plants, that ok with me. If they cut down on CO2, that's a bummer cuz we are heading into an ice age and need more green house gasses