CRGreathouse said:
Does anyone have data on how electricity is actually used? (In the world, the UK, the US, the EU, or whatever.) I imagine lighting isn't that large a portion, and that most of it wasn't incandescent (highway lighting, factory lighting, etc.).
Before I switched out my incandescents my household electricity bill would be dominated by lighting (~50%?) in the spring and fall, but I don't know that I was typical and I'm pretty sure that consumer electricity usage is a small slice of the total.
Question: How is electricity consumed in U.S. homes?
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U.S. Residential Electricity Consumption by End Use, 2008
End-Use Quadrillion
Btu Billion Kilowatt-
hours Share of Total
Space Cooling 0.77 227 16.5%
Lighting 0.72 212 15.4%
Water Heating 0.43 127 9.2%
Space Heating1 0.42 123 8.9%
Refrigeration 0.38 110 8.0%
Televisions and Set-Top Boxes 0.35 101 7.3%
Clothes Dryers 0.26 77 5.6%
Computers and Related Equipment 0.17 49 3.6%
Cooking 0.11 31 2.2%
Dishwashers 2 0.09 27 2.0%
Freezers 0.08 23 1.7%
Clothes Washers 2 0.03 10 0.7%
Other — Miscellaneous Uses 0.89 260 18.8%
Total Consumption 4.71 1,379
http://www.eia.doe.gov/ask/electricity_faqs.asp#electricity_lighting
That was for residential.
I would have thought lighting would have been first at 30% or higher so my assumptions were incorrect as well probably because I think in terms of commerical/industrial and those statistics are for homes.
In most construction jobs installing lights and the branch circuits to support them is a huge portion of the work if not the largest part of it. Next time you are in an office count the amount of lights around you and consider how many bulbs are in each one. I've installed 40 or so 2x4 foot flourescent lights in many rooms that only had a few unused receptacles. Think of all the lighting in hallways and walkways where no other power is being consumed. Not too mention outside lighting.
An odd side effect of mass converting away from incandescant will be that some of the larger buildings will have a greater heating bill because they now lack the waste heat from incandescants. In a residential home you may not notice the heat difference but in a very large building you will.
I'm biased towards flourescent because I am one of the very few people (in fact I've met nobody else) who actually prefers white flourescent light for the light.