Luxeon K2 with TFFC

[justDIY]

not sure what TFFC really means, but I just received a preliminary datasheet in the mail and it looks like tffc means BRIGHT.

The luxeon k2 is still a power hog, but it's the only high temperature tolerant led I've run across.

The datasheet claims the new cool white K2 puts out 300lm typ at 1.5a and 220lm at 1.5a for the warm white phosphors.  They've also given a few colors a kick in the pants, green 275lm, cyan 250, blue 85, royal blue 780mW

I'll toss the datasheet on my website when I get home, Rob won't let me attach a big file directly to the post :-P

http://projects.dimension-x.net/files/newk2.pdf

[BVnursery]

Sure will be nice to see those outputs in a 20ma unit.  At least they are staying with a nice wide view angle.

[cadstarsucks]

Sure will be nice to see those outputs in a 20ma unit.  At least they are staying with a nice wide view angle.

Not possible.  The theoretical maximum is something in the neighborhood of 585Lm/W.

Dan

[minimum]

Not possible.  The theoretical maximum is something in the neighborhood of 585Lm/W.

According to Wikipedia, the max. theoretical limit is 683lm/W at 555nm. Max. theoretical limit for ideal white light source is 242,5lm/W

[cadstarsucks]

Not possible.  The theoretical maximum is something in the neighborhood of 585Lm/W.

According to Wikipedia, the max. theoretical limit is 683lm/W at 555nm. Max. theoretical limit for ideal white light source is 242,5lm/W

Goofed the first digit, that's what I get for going from memory.

Dan

[BVnursery]

Nice to see that even with theoreticals going by the wayside often that a 20ma unit doesnt max out until they get to almost 24500mcd @90 degrees.

Even more interesting is that I just received some 5Kmcd @90 degree leds which prompted my post about a conversion factor for an FC meter.

[justDIY]

The TFFC K2 is entering the retail market now.  I guess tffc means thin film flip chip, the same production technology used to make dies for the rebel leds.

The lumen numbers are scaled back from the preliminary datasheet, now claiming 275 lumens typical at 1.5a, and 200lm minimum at 1a (at 25c)

The 180lm emitter costs $5.61 at qty 1; the 200lm emitter is back ordered right now, as are most of the star offerings.