>
HEBEI I.T. SHANGHAI CO. LTD. LEDS (1)

I received a number of different LEDs from Hebei I.T. Shanghai Co. Ltd. on 07-28-04; these will be placed on the page as time permits. Not all LED types will be placed on this page simultaneously.
The second page for this company's LEDs is right here, the third page is right here, the fourth page is right here, and the fifth page is right here if you're interested.

As of 08-03-04, there are eleven photographs on this page; please be patient.

10mm Yellow LED, $0.10, www.hebeiltd.com.cn..., L833VY3C-AH
(No minimum order required)
(Received and tested 07-28-04)
This is a 10mm LED in a water-clear epoxy case.
The light it outputs is a slightly amberish yellow, with a dominant wavelength (where you would point to on a color chart) of approximately 584nm.

The beam that comes out of this LED is a bit uncharacteristic of 10mm LEDs in general, consisting of a very small, square central hotspot, surrounded by a somewhat dimmer (but still brighter than usual) wide, round penumbra, in turn surrounded by a very dim outer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 4° wide, surrounded by a bright penumbra that's approximately 15° to 20° wide.


Intensity is 8,830mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is exactly 2.00 volts DC on this LED.
Color is less red than it appears in this photograph.

This and all other LEDs on this page were measured with a Meterman LM631 light meter.
And all Hebei LEDs except for the high-flux ("spider") LEDs were powered on a Hosfelt LED tester.



10mm Blue LED, $0.39, www.hebeiltd.com.cn..., L8347UBC-AHV
(No minimum order required)
(Received and tested 07-28-04)
This is a 10mm LED in a water-clear epoxy case.
The light it outputs is a typical blue for an LED, with a dominant wavelength (where you would point to on a color chart) of approximately 470nm.

The beam that comes out of this LED is somewhat uncharacteristic of 10mm LEDs in general, consisting of a wide central hotspot, surrounded by a somewhat dimmer (but still brighter than usual) narrow penumbra, in turn surrounded by a very dim outer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 18° wide, surrounded by a penumbra that's approximately 2° to 4° wide.


Intensity is 2,950mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.32 volts DC on this LED.
Well, most LEDs are designed to operate on DC, so saying "DC" really isn't necessary. ;-)



3mm White LED, $0.22, www.hebeiltd.com.cn..., L3142UWC-AHV
(No minimum order required)
(Received and tested 07-28-04)
This is a 3mm (T1) LED in a water-clear epoxy case.
The light it outputs is a cool, slightly bluish white, with an estimated color temperature of 7,200°K.

The beam that comes out of this LED is a wide spot with a soft fall-off at its edges.

I do not have an instrument for measuring viewing angles, but in my estimation, the half-intensity angle (full angle, not half-angle) is approximately 25°.


Intensity is 4,250mcd at a forward current (If) of 26mA.
This isn't bad for a 3mm (T1) LED at all.
Forward voltage (Vf) is 3.52 volts on this LED.




8mm Blue LED, $0.30, www.hebeiltd.com.cn..., L8147UBC-AHV
(No minimum order required)
(Received 07-28-04, tested 07-29-04)
This is an 8mm LED in a water-clear epoxy case.
The light it outputs is a typical blue for an LED, with a dominant wavelength (where you would point to on a color chart) of approximately 470nm.

The beam that comes out of this LED is somewhat uncharacteristic of 8mm and 10mm LEDs in general, consisting of a wide central hotspot, surrounded by a somewhat dimmer (but still brighter than usual) narrow penumbra, in turn surrounded by a very dim outer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 18° wide, surrounded by a penumbra that's approximately 2° to 4° wide, just like the 10mm blue LED farther up this page. Remember, this is an 8mm LED, not a 10mm one.


Intensity is 4,530mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.31 volts on this LED.




5mm Green LED, $0.24, www.hebeiltd.com.cn..., L5T34LPG2C-AHV-SS
(No minimum order required)
(Received 07-28-04, tested 07-29-04)
This is a 5mm LED in a water-clear epoxy case.
The light it outputs is a typical green for an InGaN green LED, with a dominant wavelength (where you would point to on a color chart) of approximately 528nm.

The beam that comes out of this LED is fairly typical for a 5mm InGaN green LED in a clear epoxy package, consisting of a wide, somewhat blotchy central hotspot, surrounded by a dimmer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the main portion of the beam is approximately 20° wide.


Intensity is 12,590mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.22 volts on this LED.




5mm Blue LED, $0.18, www.hebeiltd.com.cn..., L5T47UBC-AHV
(No minimum order required)
(Received 07-28-04, tested 07-31-04)
This is a 5mm LED in a water-clear epoxy case.
The light it outputs is a typical blue for a GaN blue LED, with a dominant wavelength (where you would point to on a color chart) of approximately 470nm.

The beam that comes out of this LED is fairly typical for a 5mm GaN blue LED in a clear epoxy package, consisting of a wide, very slightly blotchy central hotspot, surrounded by a dimmer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the main portion of the beam is approximately 20° wide.


Intensity is 3,120mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.33 volts on this LED.




10mm Green LED, $0.50, www.hebeiltd.com.cn..., L8347PG41C-AHV
(No minimum order required)
(Received 07-28-04, tested 08-01-04)
This is a 10mm LED in a water-clear epoxy case.
The light it outputs is a typical green for an InGaN green LED, with a dominant wavelength (where you would point to on a color chart) of approximately 525nm.

The beam that comes out of this LED is somewhat uncharacteristic of 10mm LEDs in general, consisting of a wide central hotspot, surrounded by a somewhat dimmer (but still brighter than usual) narrow penumbra, in turn surrounded by a very dim outer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 18° wide, surrounded by a penumbra that's approximately 2° to 4° wide.


Intensity is 11,100mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.30 volts on this LED.




5mm White LED, $0.22, www.hebeiltd.com.cn..., L5T47UWC-AHV
(No minimum order required)
(Received 07-28-04, tested 08-02-04)
This is a 5mm LED in a water-clear epoxy case.
The light it outputs is a cool white, with an estimated color temperature of 7,500°K. This color temperature appears consistent throughout the beam, with no noticable color shifts between the hotspot and the corona.

The beam that comes out of this LED is fairly typical for a 5mm phosphor white LED in a clear epoxy package; a wide spot with a soft corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the main portion of the beam is approximately 20° wide.


Intensity is 4,840mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.35 volts on this LED.




3mm Red LED, $0.05, www.hebeiltd.com.cn..., L3142UR5C-A
(No minimum order required)
(Received 07-28-04, tested 08-03-04)
This is a 3mm LED in a water-clear epoxy case.
The light it outputs is a vivid red, with an estimated dominant wavelength (where you would point to on a color chart) of 650-660nm. My spectrometer is still broken, and I have yet to find a computer to install the new one in, so this is an eyeballed value.

The beam that comes out of this LED is fairly typical for a 3mm non-phosphor LED in a clear epoxy package; a squarish hotspot with a dimmer corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the main portion of the beam is approximately 15° wide.


Intensity is 3,320mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 1.94 volts on this LED.




10mm Red LED, $0.08, www.hebeiltd.com.cn..., L833HURC-A
(No minimum order required)
(Received 07-28-04, tested 08-03-04)
This is a 10mm LED in a water-clear epoxy case.
The light it outputs is a typical vivid red for a red LED in a clear epoxy package, with a dominant wavelength (where you would point to on a color chart) of approximately 640-650nm.

The beam that comes out of this LED consists of a very narrow central hotspot, surrounded by a wide penumbra, surrounded by a brighter ring, surrounded by a very narrow dim corona.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot and penumbra is approximately 22° wide.


Intensity is 3,003mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 1.94 volts.

This LED appears to use the same type of die (light-emitting chip) as the 3mm LED directly above. Only the dominant wavelength appears to differ slightly. The packaging of this LED is different, that is quite clear (3mm vs. 10mm).




3mm Yellow LED, $0.07, www.hebeiltd.com.cn..., L3142VY3C-AH
(No minimum order required)
(Received 07-28-04, tested 08-03-04)
This is a 3mm (T1) LED in a water-clear epoxy case.
The light it outputs is typical for a modern yellow LED in a clear epoxy package, with a dominant wavelength (where you would point to on a color chart) of approximately 585nm.

The beam that comes out of this LED consists of a fairly narrow hotspot, surrounded by a dimmer but still bright penumbra, surrounded by an orangish ring. This is a typical beam from a yellow LED in a clear case, and is nothing whatsoever to be concerned about.

I do not have an instrument for measuring viewing angles, but in my estimation, the half-intensity angle (full angle, not half-angle) is approximately 15° for the hotspot, and 22° for the outer ring.


Intensity is 5,890mcd at a forward current (If) of 26mA.
This isn't bad for a 3mm (T1) LED at all.
Color is significantly less reddish than it appears in this photograph.
Forward voltage (Vf) is 2.00 volts on this LED.




All 3mm, 5mm, 8mm, and 10mm Hebei I.T. Shanghai Co. Ltd. LEDs were powered with a Hosfelt Electronics LED tester, outputting a known current of 26mA from the receptacles the LEDs were tested in.
High-flux ("spider") LEDs were powered with a Mid-Eastern variable voltage, current-clamping power supply, with the current set to the individual 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 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.
RETURN TO OPENING/MAIN PAGE
LEDSaurus (on-site LED Mini Mart)



This page is a frame from a website.
If you arrived on this page through an outside link,you can get the "full meal deal" by clicking here.