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The new Philips 420240 10.5-watt 800-lumen LED bulb

Dave Farquhar Saving money December 23, 2012CFL, cfls, KWH, led bulbs, lumen, philips

I picked up a couple of the new Philips 10.5-watt 800-lumen LED bulbs this weekend. All around, they’re the best sub-$20 LED bulb I’ve seen yet.

Dave Farquhar

David Farquhar is a computer security professional, entrepreneur, and author. He started his career as a part-time computer technician in 1994, worked his way up to system administrator by 1997, and has specialized in vulnerability management since 2013. He invests in real estate on the side and his hobbies include O gauge trains, baseball cards, and retro computers and video games. A University of Missouri graduate, he holds CISSP and Security+ certifications. He lives in St. Louis with his family.

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How to calculate savings from reduced cooling costs when considering energy-saving improvements

Dave Farquhar Saving money June 4, 2012July 14, 2017CFL, KWH, led bulbs, lumen, philips

I learned something incredibly useful this week: For every 3 watts of energy consumption you save, you save an additional watt of power in cooling costs during the cooling season.

I bought my first CFL bulb a little over 9 years ago. I knew this was helping my AC costs too, but now I know how much.
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Dave Farquhar

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Analysis: Samsung “green” memory

Dave Farquhar Hardware, Saving money June 19, 2011June 19, 2011amd, Blade, intel, kingston, KWH, Micro Center, Missouri, samsung

I was at Micro Center today, picking up CD jewel cases and USB flash memory and a cheap USB game pad. And to buy a little extra time–I had one son with me and the other was home napping–I wandered around. In the memory aisle, I spotted some Samsung “green” memory. Manufactured with a 40nm process instead of the usual 60nm process, the modules are 2/3 the size of conventional modules, run cooler, and use up to 47% less power.

Is it worth paying extra for? As always, it depends.

Dave Farquhar

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How to decide if a computer upgrade will pay for itself in power savings

Dave Farquhar Hardware, Saving money June 15, 2011April 17, 2017amd, intel, Intel Atom, KWH, Micro Center, Missouri, phenom, power savings

I occasionally read an offhand comment where someone says he or she just bought a new computer, and the new computer is so much more power efficient than the old one, it’s going to pay for itself.

I wonder if they did the math, or if that’s what the salesperson told them. Because while I can see circumstances where that assertion would be true, but it typically would involve extremes, like replacing an aged Pentium 4 computer with, well, a netbook. They probably didn’t do that.

Part of the reason I got into computers professionally was because I was tired of hearing lies from salespeople and technicians. So let’s just take a look at this claim.
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Dave Farquhar

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