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A really neat blue light... - Journal of Omnifarious

Feb. 20th, 2005

07:54 pm - A really neat blue light...

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I got this fun blue light at Ikea today. I'll post more about the shopping trip later, but I have to share these pictures with you all now. :-) This light uses blue LEDs, so no matter what color my camera decided on, this light is no color besides blue.


The camera settings tuned to adjust shutter speed based on total available light.


The camera settings tuned to adjust shutter speed based on light from center of picture.


With the flash turned on.

Current Mood: [mood icon] artistic

Comments:

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From:scottscidmore
Date:February 20th, 2005 09:33 pm (UTC)
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Actually, there are other colours besides blue in those LEDs. Cut a narrow slit in something opaque, such as thin cardboard or aluminum foil. The set it and a CD up so the light from the lamp comes through the slit, and bounces off the data surface of the CD into you eye(s). You'll see a rough spectrum, there's usually a fair amount of other wavelengths.

In particular, 'true blue' LEDs usually have a bit of very near UV, and a small bump in the deep red/very near IR. Both wavelength ranges do not translate well on most CCD cameras, giving pink and lavender hues.

http://www.ledtronics.com/datasheets/Pages/general_information/100-02a.htm
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From:omnifarious
Date:February 21st, 2005 09:21 am (UTC)
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That's interesting and educational. Thanks! I thought it was the camera trying to adjust the white balance. Though it puzzled me as to why it managed to figure out the walls were blue then.

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From:scottscidmore
Date:February 20th, 2005 09:36 pm (UTC)
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I forgot to say - pretty cool looking lamp 8-)

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From:omnifarious
Date:February 21st, 2005 09:31 am (UTC)
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Thanks. :-)


The best part is that the plastic squares are adjustable. I can rotate them around the central hub and change the appearance of the lamp in interesting ways. :-)

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From:brighteyez
Date:February 21st, 2005 06:52 am (UTC)
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That is pretty cool looking. :)
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From:omnifarious
Date:February 21st, 2005 09:32 am (UTC)
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Thanks! :-)

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From:somewoman
Date:February 21st, 2005 10:15 am (UTC)

Can't see the pictures...

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But I think I know which lamp you're talking about. IKEA has a lot of cool lighting devices. (I myself have the blue one that looks like a vase (also available in white and green).)
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From:omnifarious
Date:February 21st, 2005 10:27 am (UTC)

Re: Can't see the pictures...

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I'm using Coral to host the pictures. So, they come off of my own webserver and then are cached by Coral. Sometimes it takes awhile for Coral to work right for someone, but it should work.

If you really want to see the pictures and Coral just isn't working, you can remove the .nyud.net:8090 from the end of the hostname portion of the link to the pictures, and it should work.

I've decided I really dislike IKEA the store, but I really like the stuff they sell there. :-/ I don't like the way the store is layed out, and I don't like how insanely busy and crowded it is.

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From:somewoman
Date:February 21st, 2005 10:35 am (UTC)

Re: Can't see the pictures...

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Okay... I saw the picture this time. It was the one I was thinking of. Very cool.

I don't like how you can't just pop into IKEA for 15 minutes to pick up something. Though, making it into a big production is a fine excuse for taking a Swedish apple cake break. :^)
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From:omnifarious
Date:February 21st, 2005 11:15 am (UTC)

Re: Can't see the pictures...

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I tend to be a very focused shopper (at least when I'm not shopping for computer equipment :-), so the fact that IKEA forces me to wander around a bunch of stuff that I would vastly prefer to ignore is very annoying.

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From:daisykitten
Date:February 21st, 2005 08:40 pm (UTC)
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From:omnifarious
Date:February 22nd, 2005 07:26 am (UTC)
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Actually, the best part is that LEDs use about 1/3rd the energy of flourescents for the same amount of light. That makes about 1/10th the energy of an incadescent.

So, yes, the lights are expensive, but it's really well worth it. They last forever and use minimal energy.

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From:jadedparts
Date:February 27th, 2005 05:29 am (UTC)
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If you don't mind me asking, how much was the light?
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From:omnifarious
Date:February 27th, 2005 09:11 am (UTC)
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$30 or so. And I don't mind a bit. I'm curious as to how you found my journal though. :-)

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