Dean W. Armstrong

As previously mentioned , I've tried to keep track of CFL bulbs I used and how long they have lasted. Some have outlived some of the new...

A third CFL failed in my torchiere conversion I did back in the winter of 2008. I used this light about 7 hours a day consistently until m...

I just noticed that a second CFL failed in my torchiere conversion I did back in the winter of 2008. I use this light about 7 hours a day ...

The newish fluorescent light (well, added in 1999 to make up for a lost skylight) fixture in the RAS office must have an electronic ballast ...

If you are curious, the resistance of a 300W type J halogen bulb, the ones you would find in those halogen torchiere lamps, is 3.3 ohms when...

Stanley Fish writes in the NYTimes: But my house is now full of environmentally approved lightbulbs. They are dim, ugly and expensive, but I...

The WSJ has an article on light pollution: http://online.wsj.com/article/SB121692767218982013.html?mod=googlenews_wsj Light pollution has tr...

Updates. I tried to help Igor out on his Tesla coil. It's a traditional spark-gap variety coil. The problem was the secondary kept arc...

Compact Fluorescents are all hot right now. And it's Earth Week. I bought a floor lamp from Home Depot that used a single standard bulb...

When I need good near-infrared lighting, I turn to the broadband sources called the Sun and incandescents. They are the closest thing to a ...

New lights dim club's stargazing The new lights have created extensive light pollution in the local sky, a phenomenon that occurs when l...

I received my latest box of goodies from Jameco, and in it was a particular weakness of mine. I'm a sucker for the latest and greatest L...

Compact fluorescent lighting is a hot topic in the media right now. Repeated utility and environmental group campaigns have encouraged peop...

Via Chicagoist comes news of a green house exhibit at the Museum of Science and Industry for springtime. I have to ask a serious question:...

Here's a reason to go out and buy the August 20th issue of the New Yorker : An article on light pollution ! I sincerely hope you've...

The media has globbed onto the existence of planned astronomical communities where bad lighting design is not allowed by rules and housing ...

A fine night in Chicago, the Moon near Regulus, with Saturn halfway between the Moon and Venus. Space Shuttle Atlantis and the Internationa...

A long followup on the compact fluorescent story from Pharyngula . My previous calculations about mercury in compact fluorescents .

Ah drat. A slashdot article appeared about some poor lady in Maine broke a compact fluorescent lamp and freaked out about the small amount...