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ISP Korea High-Flux LEDs



International Systems Processing (ISP), White High-Flux LED, part # ZXWF5
Received on 01-13-04, tested on 04-13-04
This is a high-flux, or "spider" LED from ISP Korea. As is typical with high-flux LEDs, this device comes in a plastic package with four leads. Two of the leads are connected to the (+) anode, and two are connected to the (-) cathode. The LED package is square, and has one of the corners truncated (cut off) where you should attach one of the (-) cathode leads.

The white color emitted by this LED is a cool white, estimated at around 7,000K. There are no colored or dark artifacts in the beam at all.


Measures 4,640mcd on a Meterman LM631 light meter.
The datasheet says it should output 7,000mcd typical; maybe mine is bad. :-/
It has a viewing angle of 120. As usual, wider viewing angles always equal fewer mcds.
Test current 80mA




International Systems Processing (ISP), Yellow High-Flux LED, part # ZXYF5
Received on 01-13-04, tested on 03-07-04
This is a high-flux, or "spider" LED from ISP Korea. As is typical with high-flux LEDs, this device comes in a plastic package with four leads. Two of the leads are connected to the (+) anode, and two are connected to the (-) cathode. The LED package is square, and has one of the corners truncated (cut off) where you should attach one of the (-) cathode leads.

When I looked down the business-end, I saw four dice (chips) in there, instead of the usual one.

The LED's dominant wavelength (where you would point to on a color chart) appears to be around 587nm, which is right where this lamp should be. My spectrometer is busted, so this is an "eyeballed" value. The viewing angle of this LED is a very wide 120, and it floods the target with an even, yellow-amber light.


Measures 1,140mcd on a Meterman LM631 light meter.
As usual, wider viewing angles always equal fewer mcds.
Test current 84mA
Color is less reddish than this photograph makes it appear.



International Systems Processing (ISP), Blue High-Flux LED, part # ZXBF5
Received on 01-13-04, tested on 02-09-04
This is a high-flux, or "spider" LED from ISP Korea. As is typical with high-flux LEDs, this device comes in a plastic package with four leads. Two of the leads are connected to the (+) anode, and two are connected to the (-) cathode. The LED package is square, and has one of the corners truncated (cut off) where you should attach one of the (-) cathode leads.

Dominant wavelength (where you would point to on a color chart) appears to be right around 470nm, right where it should be for this LED. My spectrometer is broken, so I can't actually measure this.


Measures 2,000mcd with a test current of 78mA.
Viewing angle is a wide 120, and remember, wider viewing angles always equal fewer mcd.

This LED is rated at 80mA forward current. My test set produced 78mA during these measurements.
As they say, "close enough for government work". :-)



International Systems Processing (ISP),White stud-type LED, part # (Not yet known)
Received on 01-13-04, tested on 01-14-04
This is an unusual high-flux, Luxeon type LED in an unusual stud-type package.
The LED appears to be 11mm wide at its widest point, but I don't know what the TPI is on that bolt.
There are no data sheets I can refer to, so I guess you're on your own here. :-\



Like I said, I don't know much about these LEDs, so I don't have a lot of information about it for this page.


Test current 360mA.
Measures 9,600mcd.
I'm not equipped to measure beam angles, but this appears to be at least 120.
Remember, wider viewing angles always equal fewer mcd.




WHITE 5500-6500K InGaN+phosphor 
ULTRAVIOLET 370-390nm GaN 
BLUE 430nm GaN+SiC
BLUE 450 and 473nm InGaN
BLUE Silicon Carbide
TURQUOISE 495-505nm InGaN
GREEN 525nm InGaN 
YELLOW-GREEN 555-575mn GaAsP & related
YELLOW 585-595nm
AMBER 595-605nm
ORANGE 605-620nm
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RED 640-700nm
INFRARED 700-1300nm
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