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HEBEI I.T. SHANGHAI CO. LTD. LEDS (9)

I received yet another shipment of LEDs from Hebei I.T. Shanghai Co. Ltd. on 7-25-05.
The first page is right here, the second page is right here, the third page is right here, the fourth page is right here, the fifth page is right here, the sixth page is right here, the seventh page is right here, and the eighth page is right here if you're interested.



***VERY IMPORTANT!!!***
All Hebei LEDs on this website with "Received" dates of 2005 and older are now obsolete!!!
New LEDs are being sent as of 08-18-08; they will receive their own web pages so as to not confuse them with the obsolete components.



Water-clear 5mm green LED, $TBA, www.hebeiltd.com.cn..., 5347LPG2C
(No minimum order required)
(Received 07-25-05, tested 02-05-09)

This is a green LED in a water-clear epoxy through-hole package.
The size is 5mm or T1 3/4.

The beam that comes from this LED is mainly circular with some rather noticeable "blotchy"- and "ringy"-type artifacts in it. This is a perfectly normal beam configuration for a nonphosphor lamp of this type though, and is nothing whatsoever to be concerned about.


I do not yet have the target at my new Federal Way WA. USA location, so I shot this photograph onto the white wall inside my closet with part of a wall clock shown for scaling purposes.
Measures 9,600mcd on a Meterman LM631 (now being sold as the Amprobe LM631A) light meter.
Forward voltage (Vf) is 2.915 volts across this LED at 19.28mA.
The intensity produced is nothing to write home about, but it is decent.
I must also remember that this LED is more than four years old as of these analyses.


Spectrographic plot
Spectrographic analysis of this LED.
USB2000 spectrometer graciously donated by P.L.



Water-clear 5mm blue-green LED, $TBA, www.hebeiltd.com.cn..., 5747SPG41C
(No minimum order required)
(Received 07-25-05, tested 08-18-08)

This is a blue-green LED in a water-clear epoxy through-hole package.
The size is 5mm or T1 3/4.

The beam that comes from this LED is mainly circular with some slight but noticeable "blotchy"-type artifacts in it. This is a perfectly normal beam configuration for a nonphosphor lamp of this type though, and is nothing whatsoever to be concerned about.


Measures 7,230mcd on a Meterman LM631 (now being sold as the Amprobe LM631A) light meter.
Forward voltage (Vf) is 3.059 volts across this LED at 19.28mA.
The intensity produced is nothing to write home about, but it is decent.
I must also remember that this LED is more than three years old as of these analyses.


Spectrographic plot
Spectrographic analysis of this LED.
USB2000 spectrometer graciously donated by P.L.



Water-clear 3mm blue LED, $TBA, www.hebeiltd.com.cn..., 314ubc
(No minimum order required)
(Received 07-25-05, tested 08-16-08)

This is a blue LED in a water-clear epoxy through-hole package.
The size is 3mm or T1.

The beam that comes from this LED is mainly circular with some slight but noticeable "ringing"-type artifacts in it. This is a perfectly normal beam configuration for a nonphosphor lamp of this type though, and is nothing whatsoever to be concerned about.


Measures 2,450mcd on a Meterman LM631 (now being sold as the Amprobe LM631A) light meter.
Forward voltage (Vf) is 3.091 volts across this LED at 19.28mA.
The intensity produced is nothing to write home about, but it is decent for a 3mm lamp.
I must also remember that this LED is more than three years old as of these analyses.


Spectrographic plot
Spectrographic analysis of this LED.
USB2000 spectrometer graciously donated by P.L.



Diffused red oval LED, $TBA, www.hebeiltd.com.cn..., 75umr2d
(No minimum order required)
(Received 07-25-05, tested 09-28-05)

This is an oval red LED in a diffused epoxy case.

The light it outputs is a slightly orangish-red. It has a dominant wavelength (where you would point to on a color chart) of approximately 628nm.

The beam that comes out of this LED is very broad and diffuse.


Unable to furnish beam photograph or intensity measurement because this is a diffused LED.
Forward voltage (Vf) is 1.941 volts across this LED at 19.28mA.
LED was tested in an American Opto Plus LED tester.

Spectrographic plot
Spectrographic analysis of this LED.
USB2000 spectrometer graciously donated by P.L.



Diffused blue oval LED, $TBA, www.hebeiltd.com.cn..., 75u1b7d
(No minimum order required)
(Received 07-25-05, tested 09-12-05)

This is an oval blue LED in a diffused epoxy case.
The chemistry of this one is GaN (gallium nitride).

The light it outputs is a slightly whitish-blue. It has a dominant wavelength (where you would point to on a color chart) of approximately 472nm.

The beam that comes out of this LED is very broad and diffuse.


Unable to furnish beam photograph or intensity measurement because this is a diffused LED.
Forward voltage (Vf) is 2.925 volts across this LED at 19.28mA.
LED was tested in an American Opto Plus LED tester.



5mm round water-clear pink LED, $TBA, www.hebeiltd.com.cn..., 515JPKC
(No minimum order required)
(Received 07-25-05, tested 09-11-05)

This is a 5mm round phosphor pink LED in a water-clear epoxy case.

The light it outputs is a purplish-pink.
I don't yet know if the phosphor formulation is organic or inorganic; only an extended (at least several days) burn-in test can determine that. As of 8:05pm PDT 09-11-05, that test is underway.

(Update 09-12-05) It's been over 12 hours now and I see no signs of degradation. Looks good (like inorganic phosphor formulation) so far. An organic phosphor would have shown visible degradation in just an hour or two; this LED does not show the signs so far.

(Update 09-12-05) It's been over 26 hours now and I see no signs of degradation.

(Update 09-13-05) It's been over 36 hours now and there's still no signs of degradation. So it's been pretty much confirmed that this LED uses an inorganic phosphor formulation.

The beam that comes out of this LED consists of a smooth hotspot falling off smoothly to corona and extinction. The beam width totals approximately 20.


Beam is less purplish and less whitish than what is shown in this photograph.
Intensity is 2,580mcd at a forward current (If) of 19.28mA.
Forward voltage (Vf) is 3.124 volts across this LED at 19.28mA.
LED was tested in an American Opto Plus LED tester.



5mm round water-clear UV LED, $TBA, www.hebeiltd.com.cn..., 53OUVC9C
(No minimum order required)
(Received 07-25-05, tested 09-11-05)

This is a 5mm round UV LED in a water-clear epoxy case.

The light it outputs is predominantly 385nm or thereabouts; the LED body fluoresces slightly to let the user know it's on without having to look directly at the LED.

The beam that comes out of this LED is a very dim, dull violet color, and appears to be approximately 55 wide.


A traditional beam photograph is not possible, so here is one of the LED itself.
Forward voltage (Vf) is 3.236 volts across this LED at 19.28mA.
LED was tested in an American Opto Plus LED tester.



8mm round water-clear red LED, $TBA, www.hebeiltd.com.cn..., 1020mr2c
(No minimum order required)
(Received 07-25-05, tested 08-27-05)

This is an 8mm round red LED in a water-clear epoxy case.

The light it outputs is a typical orangish-red for an orange-red LED. It has a dominant wavelength (where you would point to on a color chart) of approximately 633nm.

The beam that comes out of this LED consists of a square central hotspot with a smooth and wide corona, with a beam width totalling approximately 25.


Intensity is 5,960mcd at a forward current (If) of 19.28mA.
Forward voltage (Vf) is 1.904 volts across this LED at 19.28mA.
LED was tested in an American Opto Plus LED tester.



Diffused green oval LED, $TBA, www.hebeiltd.com.cn..., 7511pg2d
(No minimum order required)
(Received 07-25-05, tested 08-27-05)

This is an oval green LED in a diffused epoxy case.
I said on a forum not long ago that diffused green LEDs only came in the "old formula" (GaAlP or gallium aluminum phosphide), but the chemistry of this one is InGaN (indium gallium nitride). Now I'll have to hunt down that post and make a little..."alteration"...

The light it outputs is a slightly whitish-green. It has a dominant wavelength (where you would point to on a color chart) of approximately 520nm.

The beam that comes out of this LED is very broad and diffuse.


Unable to furnish beam photograph or intensity measurement because this is a diffused LED.
Forward voltage (Vf) is 2.946 volts across this LED at 19.28mA.
LED was tested in an American Opto Plus LED tester.



The first 5mm Hebei I.T. Shanghai Co. Ltd. LED was powered with a Hosfelt Electronics LED tester, outputting a known current of 25.5mA from the receptacles the LED was tested in.

All subsequent 3mm, 5mm, 8mm, and 10mm LEDs on this and future web pages will be tested in a GLOW-ON, LLC. LED tester that outputs a known current of 20.52mA on its 20mA setting or with an American Opto Plus LED tester with a known output of 19.28mA on the 20mA setting.

High-flux ("spider") LEDs on this and subsequent web pages will be powered with an American Opto Plus LED tester with sockets for high-flux LEDs supplying currents of 20mA, 50mA, 70mA, and 150mA.

Super high-powered LEDs will be tested on an Energy One XP-4 power supply, with drive current set to the specifications of the LED under test.




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.

Please visit this web page for contact information.

Unsolicited flashlights, LEDs, and other products appearing in the mail are welcome, and it will automatically be assumed that you sent it in order to have it tested and evaluated for this site.
Be sure to include contact info or your company website's URL so visitors here will know where to purchase your product.



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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