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Thread: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

  1. #1

    Default Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Any ideas where I can find/buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04, on starboards (MCPCB's)?

    I searched the "usual suspects" Mouser, Farnell, Digikey, etc., but they only seem to have the surface mount versions, no starboards, and not the N04 bin (D36-D37=450nm-455nm and 550-575mW).
    Actually the only source for these LEDs on starboards I could find is here: http://www.led-tech.de/en/High-Power...5_120_184.html

    But the values displayed for wavelength, luminous flux, voltage etc. on this web page are all wrong, the correct values are:
    Manufacturer code of this reel is XTEARY-0-D46-330-F0-0001
    Wavelength range is D46 = 455.0 nm- 457.5nm
    Radiant Flux 330 corresponds to 525mW – 550mW
    Voltage range is F0 = 2.75V-3.0V

    Thanks a lot for any hints!

  2. #2
    Flashaholic
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Cutter?

  3. #3

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Quote Originally Posted by Toaster79 View Post
    Cutter?
    Do you mean http://www.cutter.com.au/products.php?cat=Cree+XTE ?
    Nope.
    No XTEARY-00-0000-000000N04, they only have ...L0 and ...L07.

  4. #4
    Thread Killer Illum's Avatar
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Csshih has them on his website:
    https://illuminationsupply.com/cree-...34474bd33d874e

    Blue 10mm Star MCPCB


    unknown bin though, that you'll have to PM him
    Last edited by Illum; 04-22-2012 at 05:54 PM.

  5. #5
    Thread Killer Illum's Avatar
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?


  6. #6

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Quote Originally Posted by Illum View Post
    Craig Shih has them on his website:
    https://illuminationsupply.com/cree-...34474bd33d874e
    Blue 10mm Star MCPCB
    unknown bin though, that you'll have to PM him
    I just did; thanks a lot for the hint!

  7. #7

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Last bunch of XT-E's I ordered from RapidLED tested at exactly 451-452nm on my spectrometer, and they've been consistent. Not sure what flux they were.....

  8. #8
    Flashaholic
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Digikey, Newark also has them.

  9. #9
    Flashaholic
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    http://www.led-tech.de/de/High-Power...c_120_184.html

    edit: missed the link in the first post :S
    Last edited by Toaster79; 04-23-2012 at 01:41 PM.

  10. #10
    Flashaholic*
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    If you find the LED's and boards i an re-flow them for you. I've done this hundreds of times with my own LED's

  11. #11

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Quote Originally Posted by Optical Inferno View Post
    Digikey, Newark also has them.
    Do you have a link?
    I could not find this bin as a starboard in either shop.
    Thanks a lot!

  12. #12

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Quote Originally Posted by mds82 View Post
    If you find the LED's and boards i an re-flow them for you. I've done this hundreds of times with my own LED's
    Thanks a lot for the offer!
    I will consider that, as a last resort! :-)

  13. #13

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Quote Originally Posted by blasterman View Post
    Last bunch of XT-E's I ordered from RapidLED tested at exactly 451-452nm on my spectrometer, and they've been consistent. Not sure what flux they were.....
    Thanks a lot for the hint with "RapidLED"!
    I didn't know them and I'll check them out ASAP!

  14. #14
    Enlightened ledstein's Avatar
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?


  15. #15

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Thanks a lot, but this is the L01 bin, not the N04 bin I am looking for.

  16. #16

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Hi guys,

    thanks a lot for all your help!
    I ended up using the LEDs from Craig Shih from Illuminationsupply.

    If you want to see what underwater fluorescence looks like (which is what I used these LEDs for),
    and why some people say that it is like being in the movie "Avatar",
    have a look at this video of mine:
    http://www.youtube.com/watch?v=4V9TCdCbX6U

    BTW, it turned out that fluorescence is much stronger with blue light than with UV,
    apparently because marine life has adapted during evolution to the properties of water,
    which is more transparent to blue light than it is to UV.

    Enjoy!

  17. #17

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Some of us here, like Blasterman and myself, are into reef aquariums, so we are familiar with the fluorescence of marine life. 420-500nm produces the bulk of the fluorescence, and different wavelength ranges brings out different fluorescent proteins. 455nm royal blue has the widest effect, but play with some other violet, blue, and cyan LEDs to see how different things get. 365nm UV does some interesting things for fluorescence also, so try that too.

  18. #18

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Even more great info about underwater fluorescence and fluorescence diving can be found here:

    http://www.fluomedia.org/science/
    http://www.fluopedia.org/publications/

  19. #19
    Flashaholic* lucca brassi's Avatar
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    is 460 nm too far for effective fluorescence ?

  20. #20

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    No, but it really depends on what colors you want to fluoresce. 46-470nm is great for red and orange fluorescing proteins, but 455nm and under, and 480nm and over fluoresce different colors.

  21. #21

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    460 nm is just fine for "normal" purposes of observing fluorescence under water.
    Actually I use LEDs of roughly 450-470 nm. The "trick" or trade secret lies in the use of the right excitation filter (a dichroic filter, for greater precision), which "trims" the spectrum (= distribution of wavelengths) of light output from your blue light torch, which is why the exact wavelength within the range 450-470 nm is not so important. See Spectrographs without and with dichroic filter for illustration of this.

    However, it is true that different fluorescent pigments have different maximum excitation wavelengths. Nevertheless the best compromise (to see as many fluorescent colours as possible) is blue light of 450-470 nm.
    In order to excite red fluorescence, for example, excitation light in the green part of the spectrum (530-550 nm) is slightly more effective than blue light.
    See Investigating red fluorescence with a green excitation light for illustration (note that you can play several of these videos at the same time for easier comparison by clicking on "play" of two or more videos in rapid succession).

    As you can see in these example videos, with green excitation light (and a red camera filter) you see only red fluorescence, but no other colours.

    Another option would be to use UV light, but this has many disadvantages, see Ultraviolet versus blue excitation light.
    Last edited by LarsB; 07-12-2014 at 05:24 AM.

  22. #22
    Flashaholic* lucca brassi's Avatar
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    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    I have looked on luminus series http://www.luminus.com/products/PT-39.html (uses 10 A ) but it look they are out of production

  23. #23

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    Quote Originally Posted by lucca brassi View Post
    I have looked on luminus series http://www.luminus.com/products/PT-39.html (uses 10 A ) but it look they are out of production
    If you can still find them (try e.g. www.mouser.com), the blue SST-90 from Luminus are an excellent choice (but unfortunately discontinued by the manufacturer)!

  24. #24

    Default Re: Where can I buy Cree XT-E royal blue LEDs, preferably XTEARY-00-0000-000000N04?

    P.S.:

    You can also share (or ask) everything related to fluorescence diving and underwater fluorescence in this Facebook group and Google+ community.

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