No, the battery is also much smaller in capacity. I understand that there is a lot of energy in those 18650's. I'm just saying, I wouldn't want to be standing nearby if a battery exploded.
led more powerfull than ssc p7??
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No, the battery is also much smaller in capacity. I understand that there is a lot of energy in those 18650's. I'm just saying, I wouldn't want to be standing nearby if a battery exploded.
IMO there are 2 reasons that there aren't 1s (about 3.7v) LEDs that are significantly brighter than P7. Firstly, all of the dice would have to be in parallel, and thus would need to have very close to the same Vf. Having such stringent requirements cuts manufacturing yield way down, so the LED would have to be exorbitantly expensive. Secondly, any light with adequate cooling for so powerful an LED would also be big enough to have more than one battery, so you could put them in series and be dealing with a higher voltage (and thus be able to use at least 2s or probably 4s dice).
That's my guess, at least.
That's my guess, at least.
No offense, but it seems to me that you are just looking for the brightest LED's available. That's not neccassarily the smartest thing to do. Realistically, the P7 is going to be the brightest LED in that format you will find. You keep posting pics of brighter and brighter LED's, and seem to have no thought for how they will be focused. A P7 LED, with a GOOD reflector, can be had in a relatively small format.
Other than an Aspheric lens, or custom (as in $$$$$) reflector (made specifically for one of these specialty LED's), how will you focus that light. A wall of several thousand lumens will be unusable if you can't focus it, to meet your needs.
Other than an Aspheric lens, or custom (as in $$$$$) reflector (made specifically for one of these specialty LED's), how will you focus that light. A wall of several thousand lumens will be unusable if you can't focus it, to meet your needs.
Daylight
Newly Enlightened
Moviles
take a look
Apart, talking about multi die leds, maybe today the p7 is one of the most efficient led in the market if not the best, i say best lumen/watt ratio.
take a look
Apart, talking about multi die leds, maybe today the p7 is one of the most efficient led in the market if not the best, i say best lumen/watt ratio.
moviles
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good link ty
moviles
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were to buy the p7 900 lum bin d or e pure write???
this p7 from dx its not 900 lum version
http://www.dealextreme.com/details.dx/sku.11809
maybe this other its the 900 lum version ...but are bin c (800lum only).....and vmax=3.7v ?!?! not 4.2 v?!?:scowl:
http://www.dealextreme.com/details.dx/sku.12721
this p7 from dx its not 900 lum version
http://www.dealextreme.com/details.dx/sku.11809
maybe this other its the 900 lum version ...but are bin c (800lum only).....and vmax=3.7v ?!?! not 4.2 v?!?:scowl:
http://www.dealextreme.com/details.dx/sku.12721
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bigchelis
Flashlight Enthusiast
were to buy the p7 900 lum bin d or e pure write???
this p7 from dx its not 900 lum version
http://www.dealextreme.com/details.dx/sku.11809
maybe this other its the 900 lum version ...but are bin c (800lum only).....and vmax=3.7v ?!?! not 4.2 v?!?:scowl:
http://www.dealextreme.com/details.dx/sku.12721
I have a Maglight D bin P7 direct drive with custom Heatsinking done by Nailbender running on 3 NiMH and after 5 minutes it gets really warm. I have to hold the bezel in my hand to help keep it cool (this is with a huge heatsink). So, unless you use a big host like a Maglight the heat will make it unlikely that you get the potential max lumens. I just ordered a Malkoff MC-E regulated because it keeps the current low and safer. I have the Malkoff MC-E direct drive, but at 4.5amps it was just wasted energy killing my LED faster. .
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In my understanding, the reason these other LEDs aren't low voltage has nothing to do with use in flashlights, or even off batteries, because they're not designed for that. They're meant for light-bulb replacements and such, where 12V and up are at least as easy to get from 120V or 240V as 4V and down. The manufacturers of even the nice flashlight emitters (SSC and Cree) seem to consider the flashlight market of only minor interest.
So when nobody's thinking about batteries at all, the first consideration takes precedent, and they're wired in the logical series or (where voltage considerations dictate) series/parallel.
Daylight
Newly Enlightened
This has a lot of sense :thumbsup:
moviles
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these leds10w-100w seem very small and they are very powerfull but they are powered too at 24v
http://en.hongyaled.com/newEbiz1/Eb...y&CategoryID=c373e91b97736f6e8fea0e9c688e2858
40w 24v 1.8A 2000 lum ....6x14500... damn hight voltages
60w 24v 2.5A 3200 lum.... 6x18650..damn hight voltages again!!!!
100w 32v 3.1A 5800 lum .....
what are waiting for cree for make a more powerfull led than scc p7?!?:hairpull:
http://en.hongyaled.com/newEbiz1/Eb...y&CategoryID=c373e91b97736f6e8fea0e9c688e2858
40w 24v 1.8A 2000 lum ....6x14500... damn hight voltages
60w 24v 2.5A 3200 lum.... 6x18650..damn hight voltages again!!!!
100w 32v 3.1A 5800 lum .....
what are waiting for cree for make a more powerfull led than scc p7?!?:hairpull:
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ergotelis
Enlightened
50lm/watt! Better buy a fluorescent lamp!
moviles
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the p7 has too 50lum/w or less at 5amp
and 40 lum /w at 6.5 amp
lum /w p7 bin c:
4.01 amp!!!!my ultrafire c 3 p7 give 931 lumens the first seconds with battry at 100%, now i will buy p7 bin D for get more power
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mdocod
Flashaholic
Well, you've been warned, have fun with that...
bshanahan14rulz
Flashlight Enthusiast
Ok, I figure this thread is derailed enough as it is, May I ask a quick question and then butt out?
I see you folks talk about current draw from a battery and say "oh, that thing is drawing 3C!" What is the C? I thought current was Amperes?
edit: whoops, I didn't realize there are 3 more pages! Sorry OP!!!
I see you folks talk about current draw from a battery and say "oh, that thing is drawing 3C!" What is the C? I thought current was Amperes?
edit: whoops, I didn't realize there are 3 more pages! Sorry OP!!!
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Pedantically, that's 3C/h, or 3/h * C -- the multiplier has units of inverse time, which are usually not stated, and C is the capacity (units of current * time). This habitual omission, while plain to those in the know, probably does contribute to the common confusion among newbs regarding A vs. Ah.
ergotelis
Enlightened
Safe for lion is max about 1,5C for a 18650 2200mah and it is about 3,3amp.
As xxC increases, you do increase the possibility to see a nice explosion with unknown casaulties. Moviles is about at 4amp is about at 8C. But he is not taking in account the danger so many users have talked about....I feel like hearing an explosion when i read 8C....
As xxC increases, you do increase the possibility to see a nice explosion with unknown casaulties. Moviles is about at 4amp is about at 8C. But he is not taking in account the danger so many users have talked about....I feel like hearing an explosion when i read 8C....
Marduke
Flashaholic
csshih
Flashlight Enthusiast
hey.. can't blame him.. wiring, and in this case, lumens are tasty...
hmm.. looks like a case of consumer overkill.. the consumer will do anything for the best.. I've heard of those cases.. but never seen one in person.. woah.
moville, doesnt that battery get hot at all?
hmm.. looks like a case of consumer overkill.. the consumer will do anything for the best.. I've heard of those cases.. but never seen one in person.. woah.
moville, doesnt that battery get hot at all?
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