ORANGISH-RED 625-640nm

10mm Orange-Red LED from GlowPanel 45 Plant Light, $TBA
Sent by website fan & received on 01-29-10, tested on 02-03-10

This is a 10mm orangish-red LED in a transparent, water clear epoxy body.
It produces an orangish-red light not at all dissimilar to many other orange-red LEDs, and is generally used as part of a Grow Light assembly.

Beam photograph on the test target at ~12".
Measures 3,320mcd on a Meterman LM631 (now Amprobe LM631A) light meter.
This is a fairly wide viewing angle lamp (~40 to ~45), and if I've told you once, I've told you 31,054,500 times:
Wider viewing angles always, ALWAYS, ALWAYS equal lower mcd values!!!

Spectrographic analysis
Spectrographic analysis of this LED.

Spectrographic analysis
Spectrographic analysis of this LED.
Spectrometer's response narrowed to 600nm to 650nm.
Peak wavelength appears to be 628.10nm.

Beam cross-sectional analysis
Beam cross-sectional analysis.

Hewlett-Packard HLMP-ED33-SV000 orange-red LED
Received 12-21-07, tested 01-06-08
This is a 5mm orange-red LED in a water-clear transparent epoxy body. This LED came from Digi-Key in December 2007.

Measures 7,080mcd at a drive current of 19.28mA.

Spectrographic analysis
Spectrographic analysis of this LED.

Optek Technologies OVL FR3C7 orange-red LED
Received 12-21-07, tested 01-05-08
This is a 5mm orange-red LED in a water-clear transparent epoxy body. This LED came from TT Electronics / Optek Technology in December 2007.

Measures 7,160mcd at a drive current of 19.28mA.

Spectrographic analysis
Spectrographic analysis of this LED.

Nichia 5mm orange-red LED (NSPR510CS)
Received 12-24-07, tested 12-26-07

This is (possibly) a newer model (most recent date of manufacture ~December 2007 - it is not known how long the NSPR510CS LED has been in production) Nichia NSPR510CS 5mm red LED. It comes in a water-clear epoxy case and emits radiation peaking at ~633nm in the orangish-red region of the spectrum. As far as I'm aware, Nichia does not actually manufacture red LEDs; they source the dice (light-emitting regions) from Toshiba and then complete the manufacturing process at Nichia.

The LED has a single-bond construction; and is Rank CS (tint rank "C", intensity rank "S").

Measures 4,580mcd at a drive current of 19.28mA.
Vf (forward voltage) is 1.934 volts.
Viewing angle is avertised at 30
This is a moderately wide-angle LED, and if I've told you once, I've told you a million times:
Wider viewing angles always, always, ALWAYS equal lower mcd values!!!!!!!!!

Spectrographic analysis
Spectrographic analysis of this LED.

10mm 4-chip red LED, www.zexstar.com, 1.66 ($2.12), part # LRDHR4
(Rec'd 06-26-06, tested 07-11-06)

This is a 4-chip 5mm red LED with a published wavelength of 620nm. It has four dice (light-emitting regions) connected in parallel inside the case, and is designed to be operated with a forward current (If) of 70-80mA.

Intensity was measured at 11,700mcd at an If of 86.3mA.
This LED has a wider than usual viewing angle of 35; remember, wider viewing angles always equal lower mcd values.
Vf (forward voltage) was measured at 1.916 volts at the above drive current.

Spectrographic analysis
Spectrographic analysis of this red LED.
Drive current was 86.3mA for this test.
Ocean Optics USB2000 Spectrometer on loan from TWO-CUBED.

5mm red LED, Manshun Int'l Ltd, part # YLHR5111A-NN
(Rec'd 03-22-06, tested 03-24-06)

This is a red LED, which emits at 625-635nm in the red region of the spectrum.

At a test current of 19.28mA, intensity was measured at 1,840mcd.
Published intensity values range from 2,180mcd to 3,000mcd.
Vf was measured at 1.966 volts.
I'm not equipped to measure beam angles at all. It is published as 15.

Spectrographic analysis
Spectrographic analysis of this red LED.
Ocean Optics USB2000 Spectrometer on loan from TWO-CUBED.

UltraLEDs 5mm Orange-Red LED, (www.ultraleds.co.uk)
(Recieved on 03-04-04, tested 05-03-04)
This is a 5mm (T1 3/4) LED in a clear epoxy package that a fan of the website sent in early March 2004.

It produces an orange-red beam with a dominant wavelength (where you would point to on a color chart) of approximately 630nm. My spectrometer is still broken, so I cannot confirm this with a measurement.

The beam consists of a central hotspot, surrounded by a dim region, surrounded by a bright ring.

Measures 6,100mcd at a test current of 17mA.
The viewing angle appears to be around 10. I don't have an instrument to measure this with though, so this is just a guess.

ETG Orangish-Red LED, model # ETG-5TS630-30, www.etgtech.com
(Received 10-06-03)
It's been awhile since I've had an orange-red LED up here, hasn't it?
Packaged in a standard 5mm water clear epoxy case, this lamp looks fairly ordinary until you power it up. Then you'll notice it's brighter than most other orange-red LEDs in 5mm (T1 3/4) epoxy cases.

Sample has a brightness of 5,000mcd at a test current of 19.0mA. This is definitely one of the brightest orange-red LEDs I've seen of its type. One of the two test samples became lost while setting up the photograph shoot, so I don't have the brightness reading from the second sample. :(
If I find it in the future, I'll measure it and put the reading on this page.

(Found it, and it didn't go up the vaccume cleaner!)
The second sample measures 5,400mcd with the same test current of 19.0mA that the first sample received.

The wavelength of both samples is right around 630nm.

Spectrographic analysis
Spectrographic analysis of this LED.
Ocean Optics USB2000 Spectrometer on loan from TWO-CUBED.

Agilent HLMP-ED31-SV000 5mm round
I don't know a lot about this LED, other than that it has an orange-red color and has a decent brightness and a better than average beam quality considering it is a non-phosphor type small-junction lamp. Usually, red and orange-red LEDs have a lot of rings and other garbage in the beam, but not this one.

beam profile

The better of two tested samples has a brightness of 3,200mcd in a 30 beam. Remember, those "super bright" LEDs you see sporting figures like 25,000mcd usually have very narrow beams consisting of a narrow square spot surrounded by a bright ring. Getting 3,200mcd out of a wide beam like this is nothing to sneeze at. However, what you can't see in the picture is a faint image of the die appearing in the center; this is totally out of character with a wide-angle LED and I honestly don't yet know how it's being generated. It's *much* fainter than the typical "magnified die image" you get out of narrow-beam LEDs, and shouldn't be objectionable for most uses.

Wavelength (eyeballed) appears to be a rather orangish 624-628nm, though everybody I know would holler out "Red!" if you were to ask them what color it was.

Wilycon "Ultra Red" 5mm round
This is a 5mm round LED in a water-clear case. Brightness was measured at 2880mcd at 20mA, and the beam angle appears to be in the 30-35 range.
Dominant wavelength appears to be in the 625-630nm range.

Red: $67.50/Kpcs for 50000pcs order.
small qty: USD$0.15/pc Minimum USD$10 worth.

Agilent model HLMP-EY16-VX000 red-orange, price/avail. not known
This LED is supposedly one of the brighter 5mm parts you can find. So I ran it through the ProMetric system to see what it has to say about it.

Spatial distribution chart. Note the dip in the center, which indicates the usual dark spot found in most of these higher brightness, narrow viewing angle LEDs.

Here is the beam profile analysis, showing all of the hot and cold spots in the beam.
The maximum intensity measured 5,800mcd at 22.5 inches.
At the normal distance of 12 inches, this LED measured 13,800mcd max over a 1.5" detector.

These were generated by the ProMetric System, from Radiant Imaging.

This LED has a distinctly reddish orange color, probably cashing in at around 610 to 615nm peak, and has a published viewing angle of 12.

Hewlett-Packard model HLMP-DD16 "HeNe laser" red, 10/$5.00, Newark Electronics
Here we have a very bright, light red LED. Its color is a lighter (technically, slightly oranger) shade of red than most other red models. Overall, the human eye sees it as being comparable to the color made by a Helium Neon (HeNe) plasma laser, which has a wavelength of 632.8nm; a slightly orangish shade of red.

Through the spectroscope, this LED shows a fairly wide range of output, ranging from deep red all the way into the green. But most of its output appears to peak in the 625 to 640nm area, giving it that distinctive laser-red color that you're not likely to find in many other LEDs.

I would classify this as an "ultra bright" model; for it is almost painful to look at directly. It also has a nice, even round 30 degree beam that illuminates a white test surface very brightly. When shone at a more distant target, a distinct central beam is evident, surrounded by a dimmer corona. An LED like this would be very suitable for use in keychain flashlights and in bicycle taillights because of its high brightness and nice wide beam.

Beam profile of this super bright Hewlett-Packard model.

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
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
The Punishment Zone - Where Flashlights Go to Die
Legal horse puckey, etc.

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