May: Light Switches

May was all about lights. First we did our research. Tomsguide has more than we ever wanted to know about light bulbs (pricing is US).

http://www.tomsguide.com/us/light-bulb-guide,review-1986.html

LEDs are vastly better than the alternatives, except they are more expensive. But they last forever, so it doesn’t matter unless you switch them all at once, like we did. They are the most efficient, longest lasting, and have none of the concerns about mercury (CFL) or damage to art work (halogen).

We replaced our most-used incandescents with LEDs. We didn’t replace all bulbs – this gets complicated. LEDs are not recommended for enclosed light fixtures, we couldn’t find replacement for every bulb size, and LEDs are weird with dimmers. We took the odd bulb sizes to the hardware store, and a wonderfully knowledgeable woman helped us work through the options for each. We bought 13 bulbs for $98.54. We’ll switch out halogens as they burn out over the next year. They’re more efficient than incandescents, but not nearly as good as LEDs, and short lived.

We decided to test our new LEDs using the electric meter on our house. We turned off everything but the lights, and recorded the meter disk spinning.

We couldn’t get our base consumption to zero without unplugging every device in the house, so we also measured ghost power consumption, and subtracted that number from our other measurements. As usual, our accuracy is not very. Mark liked this website for figuring out the calculations:

https://staff.washington.edu/corey/power.html

Our ghost power consumption was 122.3 watts. Incandescents to be changed consumed 559.8 W. LEDs in the same fixtures consumed 103.1 W, an 80% drop in consumption.

Mark made a video of our electricity meter running with the new LEDs compared to the old incandescents. Maureen laughs every time she watches what he did with it.

Press here for the video.

Between the LED lights, the drying rack, and the new freezer, we’re hoping for about a 20% drop in our electricity use.

Next month? It’s time to talk gardening.

 

 

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