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This CFL works the best

by dhaffnersr | February 04, 2016 20:22 04 Feb 20:22 | #12656 | #12656

dhaffnersr was awarded the Basic Barnstar by Matej for their work in this research note.

After a thousand spectral tests, I have found one CFL that I have gotten a quality calibration fit of 4 with, below is a picture of two I have tested and the one that lost an the winner!

Also I just want to point out that you will notice I have my CFL pointed at about a 45 degree angle this is the perfect angle for this type of CFL that I have found.

20160204_150517.jpg

20160204_150729.jpg

I hope this helps

Dave

4 Comments

  
Matej commented about 8 years ago

Great note. Could you explain a little more why are these two (or just one) CFLs the best? Also, why the 45 angle?

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ethanbass commented about 8 years ago

I too would be curious to know what criteria you used for selecting the winning CFL bulb. Perhaps you could expand this note by adding some spectra from each of the bulbs and a discussion of the evidence that has led you to conclude that the 2700K bulb yields superior data?

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Comment Author Profile Picture dhaffnersr commented about 8 years ago

CFL_daylight_and_non-daylight_feb24.png

CFL_daylight_and_non-daylight_blue_band_feb24.png

Above you can see both blue bands of the CFL daylight and non-daylight bulbs.

CFL_daylight_and_non-daylight_green_band_feb24.png

Above are the green bands of both the daylight and non-daylight bulbs.

Below are the SNR's (signal to noise ratio of the two differing slit widths

SNR_for_CFL's_feb24.odt

So my conclusions are based on the difference between a 6700k bulb and a 2700k one.

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Comment Author Profile Picture warren commented almost 8 years ago

@stoft posted this note the day after @dhaffnersr, looking into some of these issues too. Just wanted to link them together!

https://publiclab.org/notes/stoft/02-05-2016/cfl-selection

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