Lighting audit software & energy consumption

Why LED Lighting audit software?

For business and property owners, there’s no reason to continue using inefficient and unsightly fluorescent or halogen lights.
LED light bulbs last longer, consume less energy and require less annual maintenance. Because of this, more and more facilities around the world are switching to LED lighting – making this one of the biggest financial opportunities in decades for suppliers, ESCOs, distributors, and electrical contractors. These suppliers use Lighting Audit Software like

In fact, by 2030, LED lights have the potential to reduce energy consumption by as many as 190 terawatt hours a possible $15 billion in savings. Per-capita electricity use peaked in the U.S. in 2007. With the exception of a post-recession rebound in 2010, it has declined every year since. Here you can find more about this epochal shift, but the chart that went with it is so remarkable that I’m going to recycle it here.

Past the Peak, and Falling

U.S. annual per-capita electricity generation, in kilowatt-hours

Source: U.S. Energy Information Administration


What caused the decline? I offered several possible explanations. One of them was increased efficiency of electrical appliances. Several readers wrote in to suggest that perhaps it was the lightbulb that did it. Thomas Edison’s incandescent bulbs are being pushed aside by energy-efficient light-emitting diodes, aka LEDs, and that had to have had an impact on electricity use.


I’d been meaning to follow up on this. Then, in a blog post Monday, economist Lucas Davis of the University of California at Berkeley’s Haas School of Business beat me to it. The residential portion of the decline in electricity use, at least (my chart above includes commercial and industrial use), can be attributed largely to LEDs and other energy-efficient lighting:


Over 450 million LEDs have been installed to date in the United States, up from less than half a million in 2009, and nearly 70% of Americans have purchased at least one LED bulb. Compact fluorescent lightbulbs (CFLs) are even more common, with 70%+ of households owning some CFLs.  All told, energy-efficient lighting now accounts for 80% of all U.S. lighting sales.

LEDs use 85 percent less electricity than incandescent bulbs. Going on an estimate of 1 billion LEDs and CFLs now in U.S. homes, operating three hours per day, Davis estimated an energy savings so far of 50 billion kilowatt-hours per year, or 160 kilowatt-hours per capita, which was about equal to the decline in residential consumption he found. The total decline in my chart above comes to 1,161 kilowatt-hours per capita, which still leaves a lot of electricity savings to explain away — but LEDs and CFLs are surely cutting electricity use in commercial and industrial settings, too.



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