The odd part of the this, is that no one considers the minimal cost of the standard 100 watt bulbs leaves a lot of margin to spend on power before it costs the same as the "new" bulbs.
IF a 100 watt bulb uses .1 KW per hour, you run it for 5 hours per day, every day for a year, you will spend about $28 per year. Plus the $2 per bulb, you hit $30 per year, leaving $20 to cover the majority of the next year. Not really a fantastic money maker, even though it breaks even shy of 2 years.
I guess this is green at any cost.
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