So I have lately been wondering about the XR-E R2 bin vs the SSC P4 U2/V bin. I have researched it, and it only comes up with threads from years ago that have the early binned ones like the P3/P4 XR-E and the S2/U1 binnned P4's. So now here is my question: if someone was going to build a light, which one of these would you use (and I don't want to hear SST-50, SST-90, XP-G,XP-E, MC-E or P7 because thats not the answer I'm looking for)? Which one creates the higher luminous efficacy? Which one is more durable? And what is the highest binnned P4 the V bin, (if there is one (thought I saw it on Seoul's sight, maybe I'm crazy)) or the U2 bin? Which one can be driven higher/harder? What are your thoughts?
SSC P4 and Cree XR-E
- Thread starter Cole07
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The Cree XR-E is more efficient and robust package vs. the Seoul P4. I have used both and each of them have some pros and cons, depending on what you want to build.
Some more information on what type of light you want to build and the size would help.
Why is it that you do not want to use more efficient LEDs?
The Seoul p4 and XR-E are considered old tech.
Some more information on what type of light you want to build and the size would help.
Why is it that you do not want to use more efficient LEDs?
The Seoul p4 and XR-E are considered old tech.
I'm sure there was a politer way to point that out...
Regardless, you will find a lot of links to emitter spec sheets here
Google can help you with the rest, I'm sure.
I've been thinking of modding my 5D mag and I've heard that the P4/XR-E are much easier to work with than XP series and they are cheaper too.
fyrstormer
Banned
Last I checked, SSC's phosphors are less durable than Cree's, which would be why all the cheap pocket rockets use Cree emitters. I think their efficiencies are comparable, on account of using the same emitter dies, so really it comes down to how hard you want to drive the emitter vs. how important it is to have a smooth beam.
XP-Gs are harder to work with because of their smaller carrier size, but they don't have any pre-focusing optics on them which makes it easier to get a smooth beam instead of a bright hotspot with a dark corona around it. They're also more efficient on account of having a lower wattage per square mm at any given drive level. The XP-G R5 is definitely a step up from the XR-E Q5/R2, and it doesn't require special reflectors like the XR-E does.
XP-Gs are harder to work with because of their smaller carrier size, but they don't have any pre-focusing optics on them which makes it easier to get a smooth beam instead of a bright hotspot with a dark corona around it. They're also more efficient on account of having a lower wattage per square mm at any given drive level. The XP-G R5 is definitely a step up from the XR-E Q5/R2, and it doesn't require special reflectors like the XR-E does.
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Now we have something to work with.
Unless you plan on changing the reflector the XR-E does not work well with the stock Mag reflector whereas the Seoul is a much better choice.
The XP-G mounted on a board is much easier to work with and really does not cost much more then the p4 or the XR-E. The XP-G works well in a stock mag reflector and is much more efficient and puts out more light overall.
The XR-E with an aspheric lens in a mag makes for an extreme thrower, and can be defocused for flood also.
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Illum
Flashaholic
SSCs have been more vulnerable to damage both from the jelly dome and the tendency to shift blue awfully fast from emitter slug heat saturation...
While they are excellent for modding out Luxeon lights [same size, same collimation procedures] I don't like SSCs because of bad impression from a string of failures. Besides, they are rather chewy and has a somewhat metallic and bitter taste
While they are excellent for modding out Luxeon lights [same size, same collimation procedures] I don't like SSCs because of bad impression from a string of failures. Besides, they are rather chewy and has a somewhat metallic and bitter taste
He He, sorry, forgot to mention I'm leaning more towards throw too so yet again, XP-G is kinda out of the question...and I would prefer to have as little rings as possible.
He He, sorry, forgot to mention I'm leaning more towards throw too so yet again, XP-G is kinda out of the question...and I would prefer to have as little rings as possible.
IMO, the XP-G in a mag reflector throws quite well and has alot of spill also. The xp-g in a smaller reflector is where the xp-g does not work as well as a seoul p4.
Good luck on your build.
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The Xr-e aspheric lens mag, No. Versus a p4, yes just as well.
Again, the XR-E does not work at all in a stock mag reflector.
Most definitely! The xp-g is also rated up to 1.5 amps, just make sure you buy them from a good source and that they are mounted well on a quality PCB. I would avoid kaidomain and dealextreme's tempting inexpensive prices.
znomit
Enlightened
The XPG-R5 will produce twice the Candela for the same size reflector or solid optic a compared to the SSC P7
or the MCE. The XPE-R2 will probably equal the throw of the XPG-R5 as the die size is smaller, easier to
concentrate the beam. Less drive, longer battery life, less Lumen output and side spill.
The time for the XR, SSC P4/P7 and the MCE have passed.
A better bet for the 5D mag would be an SST-50 driven at 5 amps for good throw and high Lumen output.
Curt
or the MCE. The XPE-R2 will probably equal the throw of the XPG-R5 as the die size is smaller, easier to
concentrate the beam. Less drive, longer battery life, less Lumen output and side spill.
The time for the XR, SSC P4/P7 and the MCE have passed.
A better bet for the 5D mag would be an SST-50 driven at 5 amps for good throw and high Lumen output.
Curt
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