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bfesser
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As I posted <a href="viewthread.php?tid=19214#pid240805">before</a>, I have an abnormal amount of lighting knowledge and experience. In
my experience, Philips LED lamps are far superior to any others I've tested, and they are the only LED lamps I currently recommend. They're expensive
as hell, but the quality is unmatched and the longevity pays off. At my previous job, we even installed them upside down inside freezers (below -20
°C), no problem! In the whole time I was there, only one of the lamps failed, and it was an early generation lamp which had been run
continuously for maybe two years. I've replaced most of the lamps in my apartment with these, and I love them.
These are the two styles I recommend for standard home use:
<img src="../scipics/user:bfesser/post_pics/philips_LEDs.jpg" />
They get warm, but not untouchable. Unfortunately I don't have any expendable CDs or DVDs at the moment, otherwise I would report back with some
observations.
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nezza
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Reply to phlogiston's question. That's the problem. I get nice peaks, but have not been able to calibrate the output peak height to give a
quantitative figure of output at different wavelengths.
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bfesser
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<strong>nezza</strong>, any chance you could share the tool you use to measure the peaks with us? Or, perhaps I've misunderstood your
explanation. As I understand it, you've written a utility in <a href="http://en.wikipedia.org/wiki/BBC_BASIC" target="_blank">BBC
BASIC</a> <img src="../scipics/_wiki.png" /> that processes the image data. Maybe I should dig out my copy of <strong><a
href="http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471856134.html" target="_blank">BASIC Programming for Chemists: An
Introduction</a></strong> <img src="../scipics/_ext.png" />.
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nezza
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Yes. The program was written in R. T. Russels BBC basic for PC. The program allows you to import bitmap images and interrogate each pixel in that
image to get colour and brightness information. I have attached a text file of the program. the program takes a 1024x200 pixel image and analyses 100
of the 200 pixels in each column. The sum brightness is plotted and the maximum is displayed.
Attachment: spectrum.txt (2kB)
This file has been downloaded 570 times
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Texium
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Thread Moved
21-11-2023 at 13:29 |
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