ATA SUPER HIGH-POWERED LEDS


http://www.ledsales.com.au..., 10W high-powered warm white LED, retail AU $32.00 (US$29.61 )
Received 11-05-07, tested 11-08-07
This is a very large, warm white LED (typically 3,500K color temperature), consisting of eight (8) dice (light-emitting regions) connected in a series/parallel configuration and covered by a phosphor.



The metal outer packaging is very large; yet you'll still want to mount this LED to a heatsink or else it *WILL* overheat and fail if it is operated at its designed current for more than 8 to 10 seconds.
There are two screw holes on the top & bottom of the LED's body to allow you to do just that.
The extra metal *DOES* serve to act as heatsinking, but its primary purpose appears to be to facilitate electrical connection. However, you should not attempt to cut the excess off; it is obviously there for a reason.


Here is a look at the front of the LED, with the unit receiving just a couple of milliamps to allow the eight individual dice to be seen.
Note that the dice are underneath a large single phosphor "cap".


Measures 131,000mcd at a drive current of 718mA.

Viewing angle appears to be 165-175
This is a very 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 warm white LED.
Note that the phosphor emission is significantly greater than the LED's native blue emission.


Spectrographic analysis
Same as above; different spectrometer & software used.



http://www.ledsales.com.au..., 5W high-powered warm white LED, retail AU $20.00 (US$18.51 )
Received 11-05-07, tested 11-08-07
This is a very large, warm white LED (typically 3,500K color temperature), consisting of four (4) dice (light-emitting regions) connected in a series/parallel configuration and covered by a phosphor.


NOTE: I used the photograph of the 10W LED above, as they look virtually identical.

The metal outer packaging is very large; yet you'll still want to mount this LED to a heatsink or else it *WILL* overheat and fail if it is operated at its designed current for more than 8 to 10 seconds.
There are two screw holes on the top & bottom of the LED's body to allow you to do just that.
The extra metal *DOES* serve to act as heatsinking, but its primary purpose appears to be to facilitate electrical connection. However, you should not attempt to cut the excess off; it is obviously there for a reason.


Here is a look at the front of the LED, with the unit receiving just a couple of milliamps to allow the four individual dice to be seen.
Note that the dice are underneath a large single phosphor "cap".


Measures 75,000mcd at a drive current of 718mA.

Viewing angle appears to be 165-175
This is a very 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 warm white LED.
Note that the phosphor emission is significantly greater than the LED's native blue emission.


Spectrographic analysis
Same as above; different spectrometer & software used.



These LEDs can also be purchased in cool white if you need them in that colo(u)r.


***VERY, CRITICALLY, SUPER DUPER IMPORTANT!!!***
I've said this before, but I'll say it again. You ***MUST*** use these LEDs with heatsinks - applying anywhere near their rated power without one will cause the LED to heat up and die within a matter of seconds!!!





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