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ETG LEDs and LED Products

SMD White LED, www.etgtech.com (email Lloyd G.), Cree part # XR7090WT-U1-0011
Received 02-01-07, tested 02-02-07.

This is the new Cree 5 watt SMD LED that ETG is distributing. Cree Corporation calls this their "XR" series; model # XR7090. It comes in white, red, green, and blue. The model immediately below is the white version. The page this LED is on at Cree Corp. is right here if you're interested.

This LED accepts an input current of 700mA (0.7 amp), provided it is properly heatsinked. Maximum Vf (forward voltage) of this LED is 4.0 volts.


Viewing angle is published at 75, and is too wide for me to take an intensity measurement with the equipment at my disposal.
As always, wider viewing angles equal lower mcd values.
This photograph was taken with the LED receiving an If of 704mA.


Spectrographic plot
Spectrometer plot of this LED.
Ocean Optics USB2000 Spectrometer on loan from WWW.TWO-CUBED.COM. ***VERY IMPORTANT***
The metal core PCBs these LEDs are mounted to are NOT sufficient for heatsinking purposes!!! You'll want to mount these to a metal surface with significantly greater mass before driving them anywhere near their rated current for more than ten seconds or so!!!



5mm Water-Clear Blue LED, www.etgtech.com, # ETG-5MN470-30
Received ??-??-??, tested 07-07-04

Found these LEDs while looking for another product in response to an email I received.
This is a 5mm LED in a water-clear epoxy case, and uses what I believe is a Cree MegaBright die (light-emitting chip) to produce its light.

Dominant wavelength (where you would point to on a color chart) appears to be around 472nm, right about where it ought to be for this lamp.


Measures 2,610mcd with a test current of 26mA.
Viewing angle appears to be about 30 degrees.



5mm Water-Clear Green LED, www.etgtech.com, # ETG-5CE525-15
Received ??-??-??, tested 07-07-04

Like the blue ETG LED above, I found these LEDs while looking for another product in response to an email I received.
This is a 5mm LED in a water-clear epoxy case, and uses what I believe is a Cree MegaBright die (light-emitting chip) to produce its light.

Dominant wavelength (where you would point to on a color chart) appears to be around 528nm, right about where it ought to be for this lamp.


Measures 8,400mcd with a test current of 26mA.
Viewing angle appears to be about 15 degrees.



ETG, White, "Piranah" Super-Flux, 180, part # ETG-PRGWHT-180
Received 04-14-04, tested 04-23-04
This super-flux "Piranah" LED is also known as the "spider" LED because it has four leads, and could be mistaken for a spider if it was spray painted black or brown and thrown on the couch or dinner table. But you don't want to squish this "spider", because it produces a bountifully overflowing cornucopia of cool white photons with a color temperature of around 7,000K that no real spider could create.

This super-flux LED produces a very wide beam of 180. From a couple of feet away or more, it appears to be a point source; the LED's die cup does not function as a reflector like it does for many other LEDs.


Here's a picture of one, compared in size to a standard round 5mm LED.

The specifications for this LED indicate it needs 3.4 volts typical to 4.0 volts maximum, with a drive current of 50mA


Measures 400mcd at a test current of 47.2mA.
This LED is rated to have an output of 500mcd at 50mA; the light meter I used (a Meterman LM631) could be a bit "off" or I could have measured an LED with a slightly lower than normal intensity.



ETG, Orange, 5mm Epoxy Case, 30, part # ETG-5UC605-30
Received 04-14-04, tested 04-15-04
This is an orange LED in a standard 5mm water-clear epoxy case. The dominant wavelength (where you would point to on a color chart) of the three tested samples appears to be around 608nm (advertised as a 605nm LED), right where it ought to be for this lamp. Since my spectrometer doesn't work anymore, I used my own eyeballs to arrive at this figure.

This LED should have a 30 viewing angle. When shone at something, that figure appears to indeed be accurate. I don't have an instrument for measuring beam angles, so I kinda have to guesstimate here.


The color is less reddish than this photograph makes it appear.
I cannot take a really good picture of an orange LED beam, so this will have to do.
Measures 7,630mcd at a current of 25mA.

I used a Meterman LM631 light meter and a Hosfelt LED tester for these tests.

Spectrographic plot
Spectrometer plot of this LED.
Ocean Optics USB2000 Spectrometer on loan from WWW.TWO-CUBED.COM.



ETG, Yellow-Amber LED, 5mm Epoxy Case, 30, part # ETG-5TS590-30
Received and tested on 04-14-04
This is a yellow-amber LED in a standard 5mm water-clear epoxy case. The dominant wavelength (where you would point to on a color chart) of the three tested samples appears to be around 590nm, right where it ought to be for this lamp. Since my spectrometer doesn't work anymore, I used my own eyeballs to arrive at this figure.

This LED should have a 30 viewing angle. When shone at something, that figure appears to indeed be accurate.


The color is much less reddish than this photograph makes it appear.
I cannot take a good picture of a yellow or amber LED beam, so this will have to do.
Measures 6,240mcd at a current of 25mA.



ETG, Orangish-Red LED, 5mm Epoxy Case, 30, part # ETG-5TS630-30
Received and tested on 04-14-04
This is an orangish-red LED in a standard 5mm water-clear epoxy case. The dominant wavelength (where you would point to on a color chart) appears to be right around 630nm, right where it should be. Since my spectrometer doesn't work anymore, I used my own eyeballs to arrive at this figure.

This LED should have a 30 viewing angle. When shone at something, that figure appears to indeed be accurate.


Measures 6,920mcd at a drive current of 25mA.



ETG, Blue-Green LED, 5mm Epoxy Case, 15, part # ETG-5MN490-15
Received and tested on 04-14-04
This is a blue-green (turquoise) LED in a standard 5mm water-clear epoxy case. The dominant wavelength (where you would point to on a color chart) of the three tested samples appears to be in a narrow range, from 489nm to 493nm. The longest wavelength one appears to be just a scosh more greenish than the shortest wavelength one. But all three are more bluish than the "traffic signal green" or "ocean green" blue-green LEDs that other sellers offer. Since my spectrometer doesn't work anymore, I used my own eyeballs to arrive at these figures.

This LED should have a 15 viewing angle. When shone at something, that figure appears to indeed be accurate.

The die (light emitting portion) appears to be of Cree Corporation origin, as it has a single bond wire attaching in the center. This indicates an LED with an InGaN layer deposited on a more or less conductive silicon carbide (SiC) substrate.


Measures 5,620mcd with a test current of 26mA.
A Meterman LM631 light meter and a Hosfelt LED tester were used for these measurements.

O o, this appears to be the same kind of LED I have farther down this very page. :-O
O well, since I wrote this stuff and took the picture and measurements, it might as well stay. ;-)



ETG, Piranah Super Flux LED, Blue, 90, part # ETG-PMN460-90
Received on 01-17-04, tested on 01-30-04
This is a high flux "Piranah" LED, also known as the "spider" LED because it has four leads, and could be mistaken for a spider if it was spray painted black or brown and thrown on the couch or dinner table. But you don't want to squish this "spider", because it produces a bountifully overflowing cornucopia of deep blue photons at around 460nm that no real spider could create.

This high flux LED produces a very wide beam of approximately 90. From a couple of feet away or more, it appears to be a point source; the LED's die cup does not function as a reflector like it does for many other LEDs. The LED appears to use a Cree Corporation (formerly Cree Research) die, which is GaN (gallium nitride) on a SiC (silicon carbide) substrate with a single bond wire attaching at the top center. So it may be a bit more resistant to heat than a standard double-bond LED using GaN on an artificial sapphire substrate. But this is only speculation; as I have no documents or web pages with which to back this up. To be on the safe side, keep this LED cool, and it ought to be cool to you.


The color is a deeper blue than this photograph makes it appear.
Test current was 52mA. This LED has too wide a beam to get an accurate measurement (that, and my photometer begins to lose accuracy at blue wavelengths), so I don't have an official measurement for this part.

Advertised intensity for this part is 500mcd with a maximum continuous drive current of 50mA.
As usual, wider viewing angles always mean fewer mcds.



ETG, Milky Diffused RGB Flashing LED, part # ETG-5AX-RGB-ICR1
Received on 01-17-04, tested on 01-17-04
This is a self-flashing RGB (Red-Green-Blue) 5mm LED in a diffused, milky case. The sequence starts as a red/green/blue fade over a couple of seconds, then the individual colors fade on and stay at full intensity for about five seconds each: red, green, blue, yellow (red and green chips together), cyan (green and blue chips together), purple (blue and red chips together), and then white (all three chips on together). Then there's a brief sequence I cannot yet identify. Once complete, the sequence then repeats, except that the fade at the beginning is skipped. If power is interrupted during any part of the cycle, the sequence begins again from the start, including the two second or so fade at the very beginning.

The milky, diffused case does help mix the colors within the LED much better than a transparent case would.



I don't know much about these LEDs, so I don't have a lot of information about them for this page.
Same goes with current and voltage requirements. The LED does not stay in a steady state long enough to get a reading. Figure on feeding it around 3.6 volts at 20 or 30mA. Go much higher and you'll probably let the magic smoke out of it and it'll blow up.

NOTE: There are no beam photos or intensity measurements because this is a diffused lens LED, and I'm not equipped to take beam photos or intensity measurements of diffused lens LEDs.



ETG, 5mm Blue-Green LED, part # ETG-5MN490-15
Received on 01-17-04, tested on 01-19-04
This is a 5mm LED in a standard, water-clear epoxy case.

The overall dominant wavelength (where you would point to on a color chart) appears to be around 495nm, which is just a hair more blue than is usual for blue-green LEDs manufactured today. The color is rather vibrant and unnatural, and would work well in a device used at a rave or dance club. My spectrometer is broken, so I can't do an actual measurement on it - just an "eyeball" measurement.

The beam is circular with a more abrupt edge than is usually seen in clear bodied 5mm InGaN (indium gallium nitride) LEDs.
Although this isn't the brightest LED ever made, it's still quite bright, and isn't something you'd want to stare directly into while it's powered up.

The die (light emitting portion) appears to be of Cree Corporation origin, as it has a single bond wire attaching in the center. This indicates an LED with an InGaN layer deposited on a more or less conductive silicon carbide (SiC) substrate.


Measures 5,300mcd with a test current of 26mA.
A Hosfelt LED tester was used for this measurement.
The viewing angle appears to be around 15.

For the rest of the high current LEDs on this page, I will use an Energy One XP-4 power supply and a Meterman LM631 light meter for the tests.



ETG, model # ETG-5SE-RGB-IC, flashing RGB, $3.50 each for small qty
Received and tested 08-15-02
Part number look familiar?
Thought so. This RGB flasher LED just arrived, and it appears to be a replacement for the LED shown directly below. Instead of a blob of melted broken toilet (porcelain or ceramic) on the base, this LED is built to be mechanically identical to an ordinary 5mm LED, including having standard rectangular profile leads like most modern LEDs have.



As you can see, this LED can be used as a direct replacement for any ordinary 5mm LED, but it definitely doesn't behave like one. It has a series of flash/fade modes programmed into it, so all you do is feed it a few volts, and let it do the driving.

The exact sequence is: Series of quick flashes; red, green, blue, red+green, green+blue, blue+red, and then all three at once. It repeats this fast cycle 2 times. Next, the red fades on, stays on for about 2 seconds, then fades out. Same with green, then blue, then red+green, green+blue, blue+red, and then all three. It does this slow fade for two entire cycles; then everything begins again. Figure it takes a bit under a minute to complete the entire sequence and then recycle. If it is interrupted at any time, it restarts from the beginning as soon as you apply power again.

When driven to 20-25mA, the voltage drop ranges from 2.94v with all segments lit, to around 3.6 volts with only the green segment lit. Figure to supply it with at least 3.6 volts, but not much over that. Resistor it as you would a Nichia green, blue, or white LED (or any other high Vf gallium nitride lamp); and it won't give you any guff.



ETG, model # ETG-5SE-RGB-IC, flashing RGB, see above for newer version
Received approximately 07-05-02, tested 07-12-02

A week ago, I received a strange little "LED" lamp from ETG; it was a fully self-contained RGB LED flasher. (See below). Today, another RGB flasher LED showed up; and this one is more unusual than the last. This one comes in what looks like a standard sized, T1 3/4 (5mm) clear epoxy package with the flasher circuit and LED chips attached to the base with some kind of ceramic-looking compound.


This LED has three leads; and I'm honestly not 100% sure what they're all for. Two of them are obviously the power leads; the third one may be a control input of some kind. As I experimented with the LED, I was able to make it change flashing modes by plugging and unplugging it, and by touching the tip of another resistor connected to B+ to the third lead. I will await a pinout from my friend at ETG before I risk ruining this unusual lamp. Some things you can't un-do. You can't un-strike a match. You can't un-peel a tomato. You can't un-flush a toilet. And you can't un-blow a blown LED.



ETG, model # ETG-2SE-RGB-IC, flashing RGB, price/availability not yet known
Received and tested 07-01-02

Do you know a true "LED nutcase"? Someone who loves things that glow, and is eager to see all the new LED products as they emerge on the market? Want to make his eyes bug out like somebody switched The Price Is Right with a porno flick right in the middle of Plinko or Hole In One or Two? Then show him one of these!


Close-ups of this unique RGB flasher

Although it is labelled as a "flashing LED" and it's the same diameter as an ordinary LED, if you look closely you can see some SMD parts and some other structures inside the epoxy dome. I don't see an exposed IC; it actually appears the flasher circuit is three seperate ICs, each one mounted inside a tiny ceramic block, and each with an LED die mounted to its top. It is also possible that the IC is a larger device and is mounted underneath the visible components. In any case, this very interesting component is actually a complete, microminiature PCB with flasher circuit and three LED chips, all encased in a discrete, LED-like ceramic & epoxy package.


A couple of "action" shots.

The LEDs don't just flash. The IC is programmed with several effects, which cycle in sequence. It starts with a medium speed back-and-forth color fade, then goes to a slower, unidirectional color fade, then each LED flashes individually in sequence, then there's a pseudo-random thing where all the chips flash in some kind of alternating pattern. This last mode was too fast for me to determine the exact sequence of flashes, so let's just say it was neat. ;) Then the whole thing repeats.

According to the manufacturer, this "LED" should be treated like any other GaN LED, and its forward voltage kept at 3.6v. At that voltage, average current should be in the neighborhood of 30mA, though it is tricky to measure because the LED states keep changing.

The other item of note is the lead spacing is a little wider than is usual for a typical 5mm LED, and the leads are round in profile; rather than being rectangular (2x4 shaped) like an ordinary 5mm through-hole LED's leads are.




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
ORANGISH-RED 620-635nm
RED 640-700nm
INFRARED 700-1300nm
True RGB Full Color LED
Spider (Pirrahna) LEDs
SMD LEDs
True violet (400-418nm) LEDs
Agilent Barracuda & Prometheus LEDs
Oddball & Miscellaneous LEDs
Programmable RGB LED modules / fixtures
Where to buy these LEDs 
Links to other LED-related websites
The World's First Virtual LED Museum
Legal horse puckey, etc.
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