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HEBEI I.T. SHANGHAI CO. LTD. LEDS (2)

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 first page for this company's LEDs is right here if you're interested.

I received another shipment of LEDs from them on 08-25-04; they will appear under the 07-28-04 LEDs, and some of them will probably end up being placed on a third page and then later a forth page. The third page is now right here, the fourth page is right here, and the fifth page is right here.
As of 08-25-04, there are 12 photographs on this page; please be patient.

8mm Red LED, $0.07, www.hebeiltd.com.cn..., L813HURC-A
(Minimum order US$200, mixed orders OK)
(Received 07-28-04, tested 08-03-04, spectroscopy performed 02-08-09)
This is an 8mm LED in a water-clear epoxy case.
The light it outputs is a vivid red, 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 narrow central hotspot, surrounded by a dimmer penumbra, surrounded by a brighter outer ring. This is fairly typical of 8mm and 10mm LEDs in clear packages.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 4° wide, surrounded by a penumbra that's approximately 20° to 25° wide, surrounded by a brighter outer ring that's perhaps 4° wide.


Intensity is 4,010mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 1.94 volts across this LED.


Spectrographic analysis
Spectrographic analysis of this LED.



Auto (Piranha) High-Flux Green LED, $0.43, www.hebeiltd.com.cn..., 9452LPG41C
(Minimum order US$200, mixed orders OK)
(Received 07-28-04 tested 08-15-04)
This is a high-flux ("spider") 4-lead LED in a water-clear epoxy case.


On the left (or top) is a look at the LED itself.
One of the corners of the LED package is slightly cut off; this indicates the leads on that side are cathodes (-).
On the right (or bottom) is a top view of one of these LEDs; at the upper right corner of the LED you can see the corner has been truncated. This indicates the leads on the right are cathodes (-).

The light it outputs is a true green, with a dominant wavelength (where you would point to on a color chart) of approximately 527-529nm.

The beam that comes out of this LED is wide, and consists of a central hotspot, surrounded by a slightly dimmer penumbra. This is fairly typical of high-flux LEDs in flattish, square packages with four leads.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 10° wide, surrounded by a penumbra that's approximately 60° to 70° wide.


Intensity is 3,150mcd at a forward current (If) of 33mA.
Remember, wider viewing angles always equal lower mcd values.
This LED has a total viewing angle of approximately 60° to 70°.
Forward voltage (Vf) is 3.84 volts across this LED at 33mA.




Auto (Piranha) High-Flux Orange LED, $0.10, www.hebeiltd.com.cn..., 945LEC-610-AHV
(Minimum order US$200, mixed orders OK)
(Received 07-28-04 tested 08-16-04)
This is a high-flux 4-lead LED in a water-clear epoxy case.


Here's a look at the LED itself.
One of the corners of the LED package is slightly cut off; this indicates the leads on that side are cathodes (-).

The light it outputs is, in my opinion, a non-reddish orange, with a dominant wavelength (where you would point to on a color chart) of approximately 610-612nm.

The beam that comes out of this LED is wide, and consists of an annular (doughnut-shaped), circular hotspot, surrounded by a slightly dimmer penumbra. This is fairly typical of high-flux LEDs in flattish, square packages with four leads.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 12° wide, surrounded by a penumbra that's approximately 60° to 70° wide.


Light is very slightly less reddish than it appears in this photograph.
Intensity is 2,190mcd at a forward current (If) of 49mA.
Remember, wider viewing angles always equal lower mcd values.
This LED has a total viewing angle of approximately 60° to 70°.
Forward voltage (Vf) is 2.20 volts across this LED at 49mA.




Auto (Piranha) High-Flux Red LED, $0.14, www.hebeiltd.com.cn..., L945UR5C-A
(Minimum order US$200, mixed orders OK)
(Received 07-28-04 tested 08-16-04)
This is a high-flux 4-lead LED in a water-clear epoxy case.


Here's a look at the LED itself.
One of the corners of the LED package is slightly cut off; this indicates the leads on that side are cathodes (-).

The light it outputs is what I'd call "HeNe Laser Red", with a dominant wavelength (where you would point to on a color chart) of approximately 630-635nm.

The beam that comes out of this LED is wide, and consists of an annular (doughnut-shaped), circular hotspot (not as dimmer at the center as the orange LED directly above), surrounded by a slightly dimmer penumbra. This is fairly typical of high-flux LEDs in flattish, square packages with four leads.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 12° wide, surrounded by a penumbra that's approximately 60° to 70° wide.


Intensity is 1,930mcd at a forward current (If) of 43mA.
Remember, wider viewing angles always equal lower mcd values.
This LED has a total viewing angle of approximately 60° to 70°.
Forward voltage (Vf) is 2.12 volts across this LED at 43mA.




Auto (Piranha) High-Flux Blue LED, $0.39, www.hebeiltd.com.cn..., L9452UB5C-AHV
(Minimum order US$200, mixed orders OK)
(Received 07-28-04 tested 08-16-04)
This is a high-flux 4-lead LED in a water-clear epoxy case.


Here's a look at the LED itself.
One of the corners of the LED package is slightly cut off; this indicates the leads on that side are cathodes (-).

The light it outputs is blue, with a dominant wavelength (where you would point to on a color chart) of approximately 470-472nm.

The beam that comes out of this LED is wide, and consists of a central hotspot, surrounded by a slightly dimmer penumbra. This is fairly typical of high-flux LEDs in flattish, square packages with four leads.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 12° wide, surrounded by a penumbra that's approximately 60° to 70° wide.


Intensity is 2,130mcd at a forward current (If) of 31mA.
Remember, wider viewing angles always equal lower mcd values.
This LED has a total viewing angle of approximately 60° to 70°.
Forward voltage (Vf) is 3.72 volts across this LED at 31mA.




Auto (Piranha) High-Flux White LED, $0.39, www.hebeiltd.com.cn..., L945UW5C-AHV
(Minimum order US$200, mixed orders OK)
(Received 07-28-04 tested 08-16-04)
This is a high-flux 4-lead LED in a water-clear epoxy case.


Here's a look at the LED itself.
One of the corners of the LED package is slightly cut off; this indicates the leads on that side are cathodes (-).

The light it outputs is a slightly warmish (when compared to most other white LEDs) white, with an estimated color temperature of 4,500°K.

The beam that comes out of this LED is wide and smooth; consisting of a round, even flood with a dimmer corona. This is fairly typical of high-flux phosphor white LEDs in flattish, square packages with four leads.

I do not have an instrument for measuring viewing angles, but in my estimation, the central hotspot is approximately 12° wide, surrounded by a penumbra that's approximately 60° to 70° wide.


Intensity is 3,220mcd at a forward current (If) of 31mA.
Final reminder for today, wider viewing angles always, always, ALWAYS equal lower mcd values.
This LED has a total viewing angle of approximately 60° to 70°.
Forward voltage (Vf) is 3.45 volts across this LED at 31mA.




5mm Blue LED, $0.17, www.hebeiltd.com.cn..., L 5B47UBC-D2-AHV
(Minimum order US$200, mixed orders OK)
(Received and tested 08-25-04)
This is a 5mm LED in a water-clear epoxy case.
The light it outputs is a vivid blue, with a dominant wavelength (where you would point to on a color chart) of approximately 463-466nm.

The beam that comes out of this LED consists of a wide, somewhat annular central hotspot, surrounded by a slightly but noticeably dimmer penumbra, surrounded by a dim corona. This is fairly typical of fairly wide-angle 5mm LEDs in clear packages.

I do not have an instrument for measuring viewing angles, but in my estimation, the beam is approximately 50° wide.


Intensity is 1,720mcd at a forward current (If) of 26mA.
Remember, wider viewing angles always equal lower mcd values.
Forward voltage (Vf) is 3.42 volts across this LED.




Oval 5mm Blue LED, $0.17, www.hebeiltd.com.cn..., L763UBC-AHV
(Minimum order US$200, mixed orders OK)
(Received and tested 08-25-04)
This is an oval or "cat's eye" 5mm LED in a water-clear epoxy case.
The light it outputs is a vivid blue, with a dominant wavelength (where you would point to on a color chart) of approximately 465-468nm.

The beam that comes out of this LED consists of a wide, somewhat annular oval-shaped hotspot, surrounded by a dim corona. This is a beam configuation I have not encountered before, so I have no basis with which to perform a comparative analysis.

I do not have an instrument for measuring viewing angles, but in my estimation, the beam is approximately 50° wide by approximately 25° to 30° tall.


Intensity is 2,290mcd at a forward current (If) of 26mA.
Forward voltage (Vf) is 3.36 volts across this LED.




Flat-top (lensless) 5mm Blue LED, $0.17, www.hebeiltd.com.cn..., L5N47UBC-AHV
(Minimum order US$200, mixed orders OK)
(Received and tested 08-25-04)
This is a flat-top (lensless) 5mm LED in a water-clear epoxy case.


Here's a photograph of the LED itself, showing the dome end is truncated and flat.

The light it outputs is a vivid blue, with a dominant wavelength (where you would point to on a color chart) of approximately 467-470nm.

The beam that comes out of this LED is a smooth, broad flood.

I do not have an instrument for measuring viewing angles, but in my estimation, the beam is approximately 140°.


Intensity is 370mcd at a forward current (If) of 26mA.
Remember, wider viewing angles always equal lower mcd
values, and this lamp has a very, VERY wide viewing angle.
This is also why the beam does not photograph very well.
Forward voltage (Vf) is 3.33 volts across 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.



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WHITE 5500-6500K InGaN+phosphor 
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