Inspired by Live Earth...
Posted by darkstar 11 years ago
...I went ahead and swapped out several more incandescent bulbs today with Energy Star CFLs.  
I've swapped out perhaps a total of 14 bulbs so far. That's about 7000 pounds of C02 eliminated overall and a savings of over $100/year in electricity cost.  
I keep incandescents for just a few places where I want the warmer color light (my lamp beside by bed) or where I have them on a dimmer switch (the dining room lights). I find that in some cases, the whiter color CFL is preferable, such as on my office desk lamp. The whiter light improves contrast on things I'm working on at my desk.  
If every American home replaced just one light bulb with an ENERGY STAR qualified compact fluorescent light bulb, we would save enough energy to light more than 3 million homes for a year, more than $600 million in annual energy costs, and prevent greenhouse gases equivalent to the emissions of more than 800,000 cars.  
If the only thing that the Live Earth concerts do is to help encourage/inspire a million light bulbs to be swapped out, then the energy expense to stage the concerts will have been well worth it. If the concerts help develop momentum for a broader shift in worldwide attitudes about climate change and energy conservation, then the energy used to stage the event will be a drop in the bucket compared to the impact it will have had down the road.
For my records...
darkstar: As of today, mah house has used 42190 kWh over the past three years (though I wasn't here for two of those). That's 42.2 megawatt hours, or an avg of 38kWh per day, or 14,000 kWh per year. :(  
I could install a 1.9kW solar roof tile system from these guys at American Solar Electric. Estimated annual energy generation would be bout 3450 kWh here in Phoenix area. That would be about 25% of my annual electricity consumption.  
The cost would be:  
$14,739 Installed price  
- $5,760 ($3 per Watt incentive from SRP electric company)  
- $2,000 (one-time US tax credit for solar installation)  
- $1,000 (one-time AZ tax credit for solar installation)  
= $5979 net cost.  
The estimated annual savings would be about $290, meaning the system would pay for itself in 20.6 years.  
(Wishful thinking: If the federal and state gov'ts were to double the tax credits, then the total cost to me would be $2979. That would be awfully attractive, and the system would pay for itself in just over 10 years. Frankly, that seems like a much better way to invest some of the government's revenue on energy independence rather than pouring it down a rathole in Iraq.)  
pneum0nic: true dat
darkstar: From mid-July 06 to mid-July 07, the 12 months I've been here, the total energy usage comes to 17360 kWh for the year.  
Low months are mid--Oct to mid-Nov and mid-Mar to mid-Apr, at 900 and 950 kWh respectively (the two mildest months for weather, here).  
High months are mid-Jun to mid-Jul (2120 kWh) and mid-Dec to mid-Jan (2280 kWh). Surprisingly, it took more energy to heat the place than it did to cool it. Probably because of the forced fan space heaters we had to use while the heat pump was being repaired for two weeks. Those suck up the juice. Previous winter, same month, was only 1030 kWh and the one before than was 1100 kWh. So the use of those space heaters alone accounted for more than a doubling of overall electricity usage in the depth of winter.  
Factoring that anomaly out, cooling the place in summer is still, by far, the biggest drain on electricity, accounting for probably 25-30% of our year's household electricity usage. That's even with the increase in the thermostat setting to 81 degrees.
fabulon7: I think I have 8 of these in my house.
clu: I'll be doing this myself next week.