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

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.

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Early impressions of G7’s 900-lumen 9W LED bulb

My latest lighting experiment is a 900-lumen bulb from G7, which is rated at 9 watts and priced at around $16. It’s advertised as equivalent to a 65W incandescent. I’ve had two of them for about two months now, and my initial impressions are favorable overall.

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LED bulbs and breakability

A longtime friend posted something on Facebook about CFL bulbs–namely, that in addition to containing mercury, that they also emit ultraviolet light. I thought everyone knew that fluorescent lights emit more UV than other types of lights and that wasn’t news, but maybe not.

I pointed out that LED bulbs don’t emit any UV light at all, and the proof is that bugs aren’t attracted to LED lights. They’ll come to an incandescent or a fluorescent light though.

He asked if LED lights pose any hazards if they break. I now have an answer. Read more

The lightbulb reinvented

Timothy Hunt asked me (via Twitter) if I’ve seen the lightbulb reinvented, an LED bulb that screws into a standard socket but has wi-fi capability so you can tune its light temperature and otherwise control it with a smartphone.

I hadn’t. But I found it interesting, and appreciate the mention. Read more

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

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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A preliminary review of the Inland warm white A19 LED bulb

Micro Center had the Inland warm white A19 LED bulbs on sale this week and had a hard time keeping them in stock. I snagged an 800 lumen (60W equivalent), non-dimmable bulb, which uses 10 watts, for $13. It’s not the state of the art in 10W LED bulbs, but the price is right and it has a 3-year warranty. Read more

When to upgrade to new LED bulbs

PC Magazine asks when it’s worth upgrading to the new Philips L Prize-winning LED bulb, lamenting its high price and long payback time. I can only say what I plan to do, based on my experience with high-efficiency bulbs. I was one of those guys paying $9 for CFL bulbs nearly a decade ago. Read more

My household’s energy usage dropped 19% in 2011

I got a letter from my utility company Saturday morning. Inside was a chart, comparing our household’s energy usage from 2010 and 2011. It dropped 19 percent.

Considering our total bill for 2011 was over $900, that’s hardly chump change. Read more

How computer and energy technology don’t relate

Bill Gates says the rapid advance of computers created unreasonable expectations for the advancement of energy technology. The argument makes sense. And while desktop computers did advance very quickly, I think people have a misconception of even how quickly computers developed–which makes it worse, of course. Some people seem to believe the computer was invented by IBM and Microsoft in 1981. Far be it from Gates to lead people to believe otherwise, but the direct ancestors of modern desktop computing date to the early 1970s, and the groundwork for even that dates to the 1940s, at the very latest.
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Review: The Lutron MS-OPS2 occupancy sensor switch

I installed a Lutron occupancy sensor switch this weekend. It detects you entering the room, turns the lights on, then turns them off five minutes after it detects nobody is in the room. The timeout period is adjustable. It comes in four models: MS-OPS2-WH (white), -AL (almond), -LA (light almond), and -IV (ivory) and retails for $29.

Installation was surprisingly easy–it took about 15 minutes, which is about how long it takes me to change a regular switch, and unlike most models in its price range it works with modern CFL and LED lighting, but I recommend some prep work ahead of time. Read more