houtex
Enlightened
Does it exist? Will it? Is it even possible?
?? A P7 in a single 123 light ??
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Raymond
Enlightened
isn't the P7 a 10W led?
That means you have to find a 123 battery that's capable of a 6C discharge, which would give a whopping 10 minutes of runtime.
You could of course run the P7@100mA, but I doubt it would be more efficient than a single P4 at 400mA.
That means you have to find a 123 battery that's capable of a 6C discharge, which would give a whopping 10 minutes of runtime.
You could of course run the P7@100mA, but I doubt it would be more efficient than a single P4 at 400mA.
The dies in a P7 are connected in parallel, not series. So you mean "P7 @ 400ma".
I think it would probably be more efficient. If you look at jtr1962's lumen testing thread, the 20ma 5mm LEDs reach peak efficiency at about 25% of their rated current:
http://www.candlepowerforums.com/vb/showthread.php?t=89607
So four underdriven dies may be brighter than a single die at the same current, as long as current level isn't on the left side of the peak efficiency range.
Toshi
I've currently got one running off a R123 & a TriFlupic in the meantime that I finished last night. Will run a 17670 later.
It's not running at it's full potential brightness but it is bright. Gets very hot on high. Strobe hurts my eyes & is very annoying! Runtime is very short with the R123 & the high discharge rate when on high is probably not good for the cell.
As for what host it is in, that's a secret right now. I will post about it soon though.
houtex
Enlightened
OOOOOHHH....Can't wait to see.
Even at 10 mins of run time...it would be like having the sun bottled up in your pocket :twothumbs
Yapo
Enlightened
heh...maybe in the future they'll have rechargable/reusable flashbangs without the bangs of course
For me, 10 minutes is just not enough run time. I would rather see this emitter in something like the SmartFire M-504C. Going farther afield could the SmartFire M-504C be modded to use the P7 and 25500 Rechargeable Lithium Batteries? It would surely need a new driver board as well.
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wvaltakis2
Enlightened
Got one in a Pierce M10/tri-flupic I built a couple weeks ago (totally awesome pocket flood), search for "Micro mega mule". I'd paste a link but can't from an iPhone.
~Chip
~Chip
Nice! I put a P7 & TriFlupic in an Arc LS with a reflector. It's been my EDC for a few days now. Will post it up soon.
I must see this Arc LS!
I will post it up as soon as I receive the Arc AA tube back from shortening. I'm currently running a R123 with it now. Should be this week.
LukeA
Flashlight Enthusiast
Especially when that discharge rate sets the cell on fire.
LEDninja
Flashlight Enthusiast
You don't have to run the P7 at 2.8A.
A CR123A will be happy providing 700 mA for an hour. At 700 mA (175 mA per die) the P7 should still put out over 200 lumens. A Fenix P1-CE sized light that can match a TK10 in overall output. (The TK10 will kill the P1-P7 in throw though).
Just swapping a P7 into a P1-Q5 won't work as the the Q5 is not driven that hard (~300 mA) and is still very efficient. I estimate going from 90 lumens to 105 lumens and loosing throw, not worth it.
A CR123A will be happy providing 700 mA for an hour. At 700 mA (175 mA per die) the P7 should still put out over 200 lumens. A Fenix P1-CE sized light that can match a TK10 in overall output. (The TK10 will kill the P1-P7 in throw though).
Just swapping a P7 into a P1-Q5 won't work as the the Q5 is not driven that hard (~300 mA) and is still very efficient. I estimate going from 90 lumens to 105 lumens and loosing throw, not worth it.
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