Gryloc
Enlightened
Yeah, I did not realize how bright modern flashes are. So a million lumens from a normal hotshoe flash? Are one of those expensive? I am not a big photographer, and I really do not own a nice SLR camera. I did not realize how bright flashes really were. Oh well, that was just a side thought.
Well, a tri Seoul P7 has to be better than really small flashes, like those seen on compact digital cameras and some of the fancy xenon flash camera phones, right? The flash on my digital camera is pretty lousy. I seen that study by Lumileds where a 4 TFFC LED flash (which could probably produce 700 lumens at the current that they sent to those LEDs) was much brighter, or comparable to the xenon flashes on camera phones, and of course they were compact due to the lack of big electrolytic capacitors. I guess three Seoul P7s are not the mose compact, but 12 Rebels or 12 of those TFFC die flash LEDs from Lumileds (which may have been Rebels since I cannot find them for sale) would be pretty compact and bright.
As Opto-King brought up, maybe the lux on your target may be important. When taking a shot with a small zoom lens, maybe a P7 with a stocky reflector or optic would be helpful.
Sure, Seoul P7s may not be that useful in the camera world, but use in forward automotive lighting would be possible! Three Seoul P7s behind deep, specialized reflectors and lenses would produce the sheer output suitable to replace the typical and slightly higher wattage halogen headlights. From my research, 1000lm is typical for the average low beams, and 1500lm is typical for average high beams (given your normal 55W headlight bulbs and also lux depends on quality of reflector). HID is closer to 3000lm, so designing LED headlights closer to range may be better. With specialized reflectors, or well designed projector optics, three or four warmer or neutral white Seoul P7s could be a viable replacement! When I say "specially designed" reflectors and optics, I mean those that produce the desired flatter beam with horizontal cutoff, and varying beam patterns depending on low/high mode (so I can get those issues out of the way). Chew on that some...
Finally, if automotive lighting is still not suitable, then there is still interior lighting hopes for a four-die LED once the module or the entire fixture is designed for use with LED (and not just for the hot, old incandescent bulbs). I am just trying to stress that there is hope for Seoul P7 in every day use besides our flashlights...
-Tony
Well, a tri Seoul P7 has to be better than really small flashes, like those seen on compact digital cameras and some of the fancy xenon flash camera phones, right? The flash on my digital camera is pretty lousy. I seen that study by Lumileds where a 4 TFFC LED flash (which could probably produce 700 lumens at the current that they sent to those LEDs) was much brighter, or comparable to the xenon flashes on camera phones, and of course they were compact due to the lack of big electrolytic capacitors. I guess three Seoul P7s are not the mose compact, but 12 Rebels or 12 of those TFFC die flash LEDs from Lumileds (which may have been Rebels since I cannot find them for sale) would be pretty compact and bright.
As Opto-King brought up, maybe the lux on your target may be important. When taking a shot with a small zoom lens, maybe a P7 with a stocky reflector or optic would be helpful.
Sure, Seoul P7s may not be that useful in the camera world, but use in forward automotive lighting would be possible! Three Seoul P7s behind deep, specialized reflectors and lenses would produce the sheer output suitable to replace the typical and slightly higher wattage halogen headlights. From my research, 1000lm is typical for the average low beams, and 1500lm is typical for average high beams (given your normal 55W headlight bulbs and also lux depends on quality of reflector). HID is closer to 3000lm, so designing LED headlights closer to range may be better. With specialized reflectors, or well designed projector optics, three or four warmer or neutral white Seoul P7s could be a viable replacement! When I say "specially designed" reflectors and optics, I mean those that produce the desired flatter beam with horizontal cutoff, and varying beam patterns depending on low/high mode (so I can get those issues out of the way). Chew on that some...
Finally, if automotive lighting is still not suitable, then there is still interior lighting hopes for a four-die LED once the module or the entire fixture is designed for use with LED (and not just for the hot, old incandescent bulbs). I am just trying to stress that there is hope for Seoul P7 in every day use besides our flashlights...
-Tony
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for $29.25 
