A new kind of light bulb
News from R & D Magazine:

Univ. of Southern California

How many researchers does it take to change a light bulb? And how many lives could they save by changing it?

The answer to both questions is larger than you might expect. In the developing world, light bulbs might as well be insect magnets. The light they emit—particularly the blue wavelengths of LED lights—is attractive to a range of insects, drawing them out from the night and straight to people’s homes.

Many insect species are attracted to light, which means that the type of bulb you use can actually increase the risk of catching vector-borne diseases. Six million people worldwide, mostly in Latin America, are infected with Chagas disease, which is transmitted by a bug that is attracted to lights. Sand flies, also attracted to light, infect people with a protozoan parasite responsible for 20,000 deaths annually. And mosquitos, which carry malaria, are documented to be attracted to light.

On the same wavelength?
A new study led by a Univ. of Southern California (USC) environmental science professor and published in Philosophical Transactions of the Royal Society B has found that what matters most isn’t just how bright your bulb is, but what color wavelengths it gives off.

Future LED bulb designs could be customized to be less attractive to specific insect species, said Travis…………… continues on R & D Magazine

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How many calls does it take to fix a light fixture?
News from Gaston Gazette:

Published: Saturday, March 21, 2015 at 10:10 AM.

Sometimes the simplest of things can turn out to be just the opposite. Like turning on the light over my kitchen table, for instance.
Last week, it didn’t come on. The easy answer should be the bulb is out. Or, in this case, all four bulbs, which is the configuration on ceiling fan they’re attached to.
But what with the odds of all four lights being out at like 400 billion to 1, most likely a wire shook loose in the fan. So, I grabbed me a screwdriver — the very act alone scares Laurie to death — and climbed on a chair and unscrewed the lighting unit. There I was surprised to find that, unlike every other light fixture I’d ever dealt with in my nearly half-century of life and illumination, the lights from this fixture aren’t wired directly to the power source. No, they run through a little black relay box first.
I’m familiar with little black relay boxes and instinctively surmised this was the problem. So, after taking down the part number I went online and found this was in fact most likely the problem. I also learned the government now requires such a thing, of course, it is stupid AND problematic. That is apparently a Federal law, too.
Meanwhile, I also read several electrical blogs, where various idiots of unknown background or training described how to bypass the relay and wire i…………… continues on Gaston Gazette

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