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View Full Version : Cree XP-G R4. Wow. Just Wow.



Malaki Skywalker
10-11-2009, 12:44 PM
You should see the specs for this LED.

Lumen min.: 130
Lumen max.: 347.5
Kelvin min.: 7000
Kelvin max.: 7500
mA test.: 350 mA
mA typ.: 350 mA
mA max.: 1000 mA
V typ.: 3 V
V max.: 4 V

Thats 132 Lumens Per Watt. 3V @ 1000mA = 347.5 Lumen. Thats all one die.

They are available on stars to.

Wow.

Darth Vane
10-11-2009, 04:40 PM
What colors do they come in?

tullfan81
10-11-2009, 05:20 PM
It looks like they are only available in white...unless i didn't look hard enough.

DJMoonbass
10-11-2009, 07:29 PM
interesting. these will replace the P4 white i am just sure. :mrgreen:

Kant Lavar
10-12-2009, 10:02 PM
But... 7000 kelvin?! That's 12140.33 degrees Farenheit, or a thousand degrees hotter than the surface of the gorram Sun!

That has to be a typo. If it wasn't... hell, we'd have a for-real lightsaber. For a couple of milliseconds, then the LED would vaporize.

neophyl
10-13-2009, 12:44 AM
The paticular 'shade' colour of light is also measured in Kelvin equivalencies when it comes to white lighting. You often see white light especially leds with a 'warm' or a 'blueish' etc description which is very imprecise, using the kelvin equivalent is more precise.

Onli-Won Kanomi
10-13-2009, 10:18 AM
http://en.wikipedia.org/wiki/Color_temperature

DJMoonbass
10-13-2009, 02:54 PM
bu dum, tish! https://www.musicvi.com/store/images/T/Drums-02.bmp:mrgreen:

infa008
10-17-2009, 07:13 PM
this thing sounds too good to believe. MY questions would be, whats the life span of the led at 1000 ma. and what coloring options would there be for making the white look realistic in red green blue ect. Also how much heat does it produce and would a heatsink work or would fans be needed. It also looks small enough to configure it on a star like a tri rebel. that would take some real power though.

Kant Lavar
10-18-2009, 07:23 PM
The paticular 'shade' colour of light is also measured in Kelvin equivalencies when it comes to white lighting. You often see white light especially leds with a 'warm' or a 'blueish' etc description which is very imprecise, using the kelvin equivalent is more precise.


http://en.wikipedia.org/wiki/Color_temperature

Ah, that explains it. Thanks, guys. Learn something new every day around this hobby... ;)

KuroChou
01-15-2010, 11:44 PM
It's also a measurement you might be familiar with, in high end digital cameras.
Most newer DSLR's, in addition to having preset light settings (ex. Tungsten, Fluroescent, Daylight) they'll have a manual mode to adjust the light balance.
The color measurements will often be in Kelvin.

Corbin_Das
01-16-2010, 02:44 AM
Hey guys.

I picked up a very small personal flashlight recently that uses one of these spectacular LEDs. It's called the Fexix PD30. Uses two CR123s. Rated at up to 265 lumens in turbo mode (strobe effect). It's insanely bright. Only 1.5 hours of run time that way (vs. up to 6 hours at a lower setting).

Might make a short 3/4" blade socket for it. It'd make a cool saber dagger.


Corbin