Posts Tagged ‘bulb’

LED Streetlights Come to Town, Saving San Francisco a Couple Bucks a Month Each

Thursday, March 26th, 2009

See yesterday’s news conference in the “crime-riddenTenderloin / Adam’s Block area concerning Light Emitting Diode (LED) streetlights here with photos taken by Bill Wilson, and read all about this new technology here. The United States Department of Energy and PG&E have recently helped San Francisco conduct a beauty contest of competing brands of LED lights – read the gritty nitty here (.pdf, you might need to right click, Save File As… or whatever).

The upshot is that it’s not really worth pulling out existing street lighting to install LED lights. You can save a few bucks a month in electricity by converting a streetlight to LED and there are other benefits as well, so it appears we’ll eventually, slowly convert over with the hope that prices of these new kind of bulbs will go down. 

Take a look at the Before and After:

That’s a scene from the test in Outer Sunset. The first shot is lit with your typical High Pressure Sodium (HPS) streetlight. See how everything looks yellow, just like the background of all your nighttime photos taken outside? That’s due to sodium’s low color temperature, around 2000K or so. The same area lit by LED shows a more natural look, probably 4000-something Kelvin. If LED’s do nothing else, they’ll improve night photography in San Francisco.   

And here are the LEDs in action:

Hello lamppost,
What cha knowing?
I’ve come to watch your diodes glowing.

And speaking of the DoE, big ups to America’s new Secretary of Energy, Steven Chu. He just recently labored as a professor of physics and molecular and cellular biology at the University of California, Berkeley and he used to be the director of the Lawrence Berkeley National Laboratory.

More deets about the new lights in San Francisco after the jump.

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LA Times Says No to Compact Flourescent Light Bulbs, Yes to $8000 Chairs

Tuesday, January 6th, 2009

Oh my. Comes now the Los Angeles Times Newspaper discussing “Bad Design Trends We Hope Die in 2009.”

“CFLs: To be green, you do not need to suffer with compact fluorescent bulbs, a light source that does not render color or texture and only turns on and off. Instead, do the planet a favor by using a combination of a halogen bulb, which does not use mercury or rare earth phosphors, and a dimmer. If you dim a halogen bulb to 50%, you will save over 40% energy and your light bulb can last more than 10 years.”

Let’s take a quick inventory of the allegations against our huckleberry friend, the Compact Fluorescent Lamp.

via fangelman’s photostream

1. “suffer with compact fluorescent bulbs”

Some people can handle CFLs with ease. Why not try? Some people love them.

2. “only turns on and off”

Nope. Dimmers are available, don’t cha know?

3. “halogen bulb, which does not use mercury”

Halogen bulbs have a few issues with mercury too, don’t cha know? Arguably, more issues.

4. “If you dim a halogen bulb to 50%, you will save”

Why in the heck would you run a bulb at 50% all the time? Wouldn’t you just install a bulb with half the power?

Here in Northern California, we still believe in CFLs. As does the PG&E. How unfashionable of us!

And what should we buy, per this article in the Times?

Ralph Lauren chairs.

That’s right. $8000 Ralph Lifshitz chairs.

See you in Hell, LA Times.