SPECTRA OF LOW-POWERED YELLOW-GREEN LEDS


This web page will be for nothing but spectra of 10mm, 8mm, 5mm, 3mm, and SMD LEDS (driven at 20mA to 60mA):

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.



YELLOW-GREEN

Spectrographic analysis
Spectrographic analysis of an odd-based 5mm yellow-green LED from the 1970s.


Spectrographic analysis
Spectrographic analysis of a yellow-green LED from the late-1960s.


Spectrographic analysis
Spectrographic analysis of a flat-faced yellow-green LED from the 1980s.


Spectrographic analysis
Spectrographic analysis of a T yellow-green LED, probably from the early-1970s.


Spectrographic analysis
Spectrographic analysis of one of the LED segments (yellow-green) in the Rainbow Big-Digit LED Clock.


Spectrographic analysis
Spectrographic analysis of the yellow-green LED in the Indiana Jones Light-Up Spoon.


Spectrographic analysis
Spectrometer plot of a Panasonic LN3 LED - this LED looks like a germanium radio diode and was made by Panasonic in the late-1970s to the early-1980s.
They have a leakage current in the femtoamps and were used as a low leakage reference diode. Nowadays, they use something called a "bandgap reference" for the really low voltages; above about 1.8 volts we start to see ordinary zener diodes.


Spectrographic analysis
Spectrographic analysis of an early yellow-green LED, circa. 1976.


Spectrographic analysis
Spectrographic analysis of a yellow-green double-die LED from the 1970s.


Spectrographic analysis
Spectrographic analysis of the LED in the Coleman LED Campsite Marker Light.


Spectrographic analysis
Spectrographic analysis of the yellow-green LED in the Light-Up Halloween Necklace.


Spectrographic analysis
Spectrographic analysis of a Radio Shack 3mm yellow-green LED from the #276-1322 assortment pack.


Spectrographic analysis
Spectrographic analysis of a Radio Shack yellow-green LED from the #276-1322 assortment pack.


Spectrographic analysis
Spectrographic analysis of the LED in the Shrek Ear-Clip Knight Light.


Spectrographic analysis
Spectrographic analysis of a 5mm yellow-green LED.


Spectrographic analysis
Spectrographic analysis of a yellow-green LED with a somewhat rectangular profile.


Spectrographic analysis
Spectrographic analysis of a yellow-green 5mm LED.


Spectrographic analysis
Spectrographic analysis of a very old yellow-green LED.

Spectrographic analysis
Here is a photograph of the actual LED used for this test.


Spectrographic analysis
Spectrographic analysis of a red/green Radio Shack bicolor LED (green).


Spectrographic analysis
"Original chemistry" yellow-green LED.










Do you manufacture or sell an LED flashlight, task light, utility light, or module of some kind? Want to see it tested by a real person, under real working conditions? Do you then want to see how your light did? If you have a sample available for this type of real-world, real-time testing, please contact me at ledmuseum@gmail.com.

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GREEN 525nm InGaN 
YELLOW-GREEN 555-575mn GaAsP & related
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