SPECTROGRAPHIC (NORMAL & NARROWBAND) AND POWER OUTPUT ANALYSES OF LEDs THAT KLAATU SENT IN LATE-MARCH 2013 (1)




Ocean Optics USB2000 Spectrometer donated by P.L.
As of 10-10-07, I've been using a PC2000-ISA Spectrometer from Ocean Optics that I received several years ago, but that I didn't have a home for until now.
As of 03-08-08, I once again have the USB2000 spectrometer, enabling color spectra again.
As of 09-19-09, I no longer have the PC2000-ISA; it was sold to prevent an eviction.

SPECTRA (NORMAL & NARROWBAND) OF LEDs THAT KLAATU SENT IN LATE-MARCH 2013 (1):

All spectra were performed with an If (forward current) of 330mA.






Received 03-23-13, tested 03-26-13

Beam terminus photograph of a high-powered phosphor violet/red (purple) LED (420nm + 613nm) from an unknown OEM.

key                     AAD
purchase date           2013-02-04
shipping time days      8
color                   purple
listing                 10X 1W Ultra Violet 420nm~435nm High Power Star UV LED Light for Tank/Stage Deco
item code               321065474263
source                  ebay
vendor                  top-ledlight
url                     http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=321065474263
note                    very intense, brighter than 3w 420nm when both at 330mA, pinkish color, has phosphor
price each              $1.70
price lot               $16.99
lot size                10
mil	
lower wavelength        420
upper wavelength        435
wattage                 1
current mA              350
lower voltage           3
upper voltage           3.6
lower lumen             20
upper lumen             40
beam angle degrees      120


Spectrographic plot
Spectrographic analysis of a high-powered phosphor violet/red (purple) LED (420nm + 613nm) from an unknown OEM.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.


Spectrographic plot
Spectrographic analysis of a high-powered phosphor violet/red (purple) LED (420nm + 613nm) from an unknown OEM; spectrometer's response narrowed to a band between 405nm and 415 to pinpoint peak wavelength, which is 411.080nm.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.


Spectrographic plot
Spectrographic analysis of a high-powered phosphor phosphor violet/red (purple) LED (420nm + 613nm) from an unknown OEM; spectrometer's response narrowed to a band between 625nm and 635 to pinpoint phosphor peak wavelength, which is 613.020nm.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.



Received 03-23-13, tested 03-25-13

Beam terminus photograph of a high-powered royal blue LED (442nm) from an unknown OEM.
That pinkish color is because my camera doesn't "do" pure or nearly pure blue very well.
key                             AAL
purchase date                   2013-03-01
shipping time days              7
color                           blue
listing                         wdm 10x leds 3W blue 442-445nm 30-40LM 700mA higher power led Epileds chip
item code                       170892756617
source                          ebay
vendor                          merryday168
contact                         merry wu
url                             http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170892756617
story                           442-445nm, epileds
price each                      $1.60
price lot                       $15.99
lot size                        10
mil                             45
lower wavelength                442
upper wavelength                445
wattage                         3
current mA                      700
lower voltage                   3.4
upper voltage                   3.6
lower lumen                     30
upper lumen                     40	
beam angle degrees              120
lifespan hours                  10,000

Spectrographic plot
Spectrographic analysis of a high-powered royal blue LED (442nm) from an unknown OEM.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.


Spectrographic plot
Spectrographic analysis of a high-powered royal blue LED (442nm) from an unknown OEM; spectrometer's response narrowed to a band between 435nm and 445nm to pinpoint peak wavelength, which is 439.501nm.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.




Received 03-23-13, tested 03-25-13

Beam terminus photograph of a high-powered red LED (640nm) from Shenzhen Youxinguang Technology Co., LTD.
That pinkish color is because my camera doesn't "do" pure or nearly pure red very well.

ESD Senstivity: 2000V Max. Forward Current: 700mA Vendor: Shenzhen Youxinguang Technology Co., LTD. URL http://www.aliexpress.com/snapshot/219043349.html Note Tested at 540mA, very bright; looks like 630nm; leads reversed Price each 24 Price lot $23.75 Lot size 100 Lower wavelength 640 Upper wavelength 660 Wattage 1 Current mA 700 Lower voltage 2.0 Upper voltage 2.4 Lower lumen 35 Upper lumen 40



Spectrographic plot
Spectrographic analysis of a high-powered red LED (640nm) from Shenzhen Lux Lighting Co., Ltd.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.


Spectrographic plot
Spectrographic analysis of a high-powered red LED (640nm) from Shenzhen Lux Lighting Co., Ltd.; spectrometer's response narrowed to a band between 720nm and 740 to pinpoint peak wavelength, which is 628.322nm.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.





Received 03-23-13, tested 03-24-13

This is the high-powered (1 watt) 730nm near-IR LED with zener diode from Shenzhen Lux Lighting Co., Ltd.


Beam terminus photograph of a high-powered NIR LED (730nm) from Shenzhen Lux Lighting Co., Ltd.

Epistar chip
Notes:
1) All leads are reversed, minus sign is stamped on anode instead of cathode;
2) All leads are the wrong kind, they are short and stick straight out so can't be reflow soldered to the boards. Original listing picture showed normal leads.
3) 29 of 40 have solder on the leads, and are clearly used, not new.
4) All of the LEDs with solder are dead.

5) The remaining 11 leds are new and work, but have the wrong leads and they are on backwards.
6) After purchase received and vendor contacted, she changed the picture in the listing to show the clipped leads, and promised to make & send new beads with proper leads.
7) Can see tiny zener diode inside bead next to led chip



Price each: $1.50 Price for lot: $29.99 Lot size 20 Lower wavelength 730nm Upper wavelength 740nm Wattage 1 Current mA 350 Lower voltage 1.5 Upper voltage 1.7 Beam angle 90 Lifespan hours 60,000


Spectrographic plot
Spectrographic analysis of a high-powered NIR LED (730nm) from Shenzhen Lux Lighting Co., Ltd.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.


Spectrographic plot
Spectrographic analysis of a high-powered NIR LED (730nm) from Shenzhen Lux Lighting Co., Ltd.; spectrometer's response narrowed to a band between 720nm and 740 to pinpoint peak wavelength, which is 732.248nm.


Spectrographic plot
Same as above; white background was used as Klaatu prefers it for printing purposes.








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