More P7 info ...

precisionworks said:

http://ledsmagazine.com/news/5/2/27

Click to expand...

Typical output of 400 lumens at 1400mA (350mA/die) means about 100 lumens per 350mA for each die... which essentially means that the P7 is just 4 U-bin dies in parallel, in the same package.

So the efficiency hasn't gone up at all... but rather the engineers have managed to squeeze 4 dies into the same package, despite the heat produced.

I presume that heatsinking will be major issue with these LEDs... but if these are the same dies, that can be driven harder (SSC U-bin can take 1A), then we may see 1-LED 1000lumen + HOTwires very quickly.

The question is, can the P7 be pushed to do more than 400 lumens without over heating? It would be cool if it could produce 800 lumens without cooking itself, but that remains to be seen.

I was just reading about the P7 on Seoul's website. It says it will do 900 lumens with 10 watts into it.

http://www.seoulsemicon.com/en/product/prd/zpowerLEDp7.asp

It's only 70 cri, though. :thinking:

There's already a discussion in the general LED section. Lots of info.

There's already a discussion in the general LED section

Click to expand...

I searched for that before posting here, but could not find it. Moderator, please attach to that thread if you want.

http://www.candlepowerforums.com/vb/forumdisplay.php?f=91

There ya go. Join the fun.

Insanity at its largest. 900 lumens is scorching!!! That would be cool if ssc or cree can produce this with effeciency and heat dissapation.

900 Lumens at 10watts? This would require the whole light to be used as a heat sink, would it not? This might be possible to do (maybe 2 or three of 'em) in a thor mod with active cooling (fans). Anyone want to try that?

-Max

jufam44 said:

900 Lumens at 10watts? This would require the whole light to be used as a heat sink, would it not? This might be possible to do (maybe 2 or three of 'em) in a thor mod with active cooling (fans). Anyone want to try that?

-Max

Click to expand...

Nah... 10W isn't much... and it's not 10W of heat, it's 10 total watts. I figure LEDs can't be less than 50% efficient, so that's 5W of heat to dissipate.

Just heatsink the head and fin it a little... should be fine.

meuge said:

Nah... 10W isn't much... and it's not 10W of heat, it's 10 total watts. I figure LEDs can't be less than 50% efficient, so that's 5W of heat to dissipate.

Just heatsink the head and fin it a little... should be fine.

Click to expand...

Thanks Meuge, I guess I was wrong. Could 5 Watts of heat harm the LED's with just normal finning, or would anything extra be needed? (I.E. in a mag mod)

You'd have to be very careful about heat sinking. It won't have to be radical, just well designed. Of course, you could always use a multi-emitter setup. 300-400 lumens per emitter wouldn't be pushing that hard if I'm reading the specs right.