cryhavok
Enlightened
Today, I received my shipment from the SS with some Seoul P4's and I just finished the first LE build with a Seoul P4, so here are some impressions.
I ordered 4 Seoul P4's from SS and the ones I received seem to be real lottery losers :thinking: I guess it just goes to show you that the lottery is still very much alive. All of mine have a very cool tint, almost to the point of looking slightly purple. This is a real bummer I don't know how these are in terms of brightness/flux with the "typical" Seoul P4 but I think they're losers also...read on...
The builds between the seoul P4 and a regular Luxeon LE are pretty much identical, except the Seoul P4 gets a small spacer to raise the die into the correct position for optimal focus. It is also important to bend all the leads from the LED down as the whole LED basically sits inside the reflector. Without doing so will cause a short. Other than that, there is no difference in the procedure than the 30+ Luxeon LE's I've built.
Here are the test subjects
Chrome A3, Bare Al. A3, S27-PD, HAIII A1
front
A3-LuxIII, A3-XR-E, S27-PD, A1-Seoul P4
Closeup of Seoul P4 in A1
Closeup of Seoul P4 in A3
The nice thing about the Seoul upgrade is that there are no reflector modifications needed. Simply plug 'n play.
After completing this build, I can't say I'm too pleased/excited. It's very disappointing to do the builds working with some real lottery losers :sick2:
The beams are pretty much identical in terms of their pattern with the luxIII. The seoul gets a brightness advantage, though.
Here are my somewhat rough lux@1 meter readings
A1 UVOJ Flupic burst 4600 spill 40
A1 Seoul P4 Flupic burst 5700 spill 60
A1 UXOJ NG1000 4580 spill 40
A3 UXOJ NG1000 6400 spill 40
A3 Seoul P4 Flupic burst 7700 spill 60
A3 UVOJ Flupic burst 6100 spill 40
A3 Cree XR-E NG1000 1130 spill 120
As you can see, I gained about 1000 lux with the McR27 and 1300 lux with the McR38. In all fairness, the luxeon's were hand picked for brightness, so I would definately expect a larger gain when compared with a "typical" Luxeon. Add to that getting some better Seoul P4's, and you have some worthwhile upgrades.
The Cree XR-E in the A3 seems to be a pretty good lottery winner...excellent warm tint and spectacular output. The NG1000 drives the LED very very hard, though.
I'll be honest in that I'm really disappointed in the results. I don't think it is because the emitter is not focused properly...the beams are exactly like their Luxeon counterparts. I think it is more on the line that
the LED's I received were just really bad :mecry::mecry:
I know these Seoul P4's definitely have potential, given by the readings from my S27-PD
S27-PD high(525ma) 4900 spill 60
The emitter in that light has a great tint and incredible flux as well.
I'm going to try to find a better source for the Seoul P4's...perhaps photonfanatic will get some better LEDs...
Update: See post 37 for new info
I ordered 4 Seoul P4's from SS and the ones I received seem to be real lottery losers :thinking: I guess it just goes to show you that the lottery is still very much alive. All of mine have a very cool tint, almost to the point of looking slightly purple. This is a real bummer I don't know how these are in terms of brightness/flux with the "typical" Seoul P4 but I think they're losers also...read on...
The builds between the seoul P4 and a regular Luxeon LE are pretty much identical, except the Seoul P4 gets a small spacer to raise the die into the correct position for optimal focus. It is also important to bend all the leads from the LED down as the whole LED basically sits inside the reflector. Without doing so will cause a short. Other than that, there is no difference in the procedure than the 30+ Luxeon LE's I've built.
Here are the test subjects
Chrome A3, Bare Al. A3, S27-PD, HAIII A1
front
A3-LuxIII, A3-XR-E, S27-PD, A1-Seoul P4
Closeup of Seoul P4 in A1
Closeup of Seoul P4 in A3
The nice thing about the Seoul upgrade is that there are no reflector modifications needed. Simply plug 'n play.
After completing this build, I can't say I'm too pleased/excited. It's very disappointing to do the builds working with some real lottery losers :sick2:
The beams are pretty much identical in terms of their pattern with the luxIII. The seoul gets a brightness advantage, though.
Here are my somewhat rough lux@1 meter readings
A1 UVOJ Flupic burst 4600 spill 40
A1 Seoul P4 Flupic burst 5700 spill 60
A1 UXOJ NG1000 4580 spill 40
A3 UXOJ NG1000 6400 spill 40
A3 Seoul P4 Flupic burst 7700 spill 60
A3 UVOJ Flupic burst 6100 spill 40
A3 Cree XR-E NG1000 1130 spill 120
As you can see, I gained about 1000 lux with the McR27 and 1300 lux with the McR38. In all fairness, the luxeon's were hand picked for brightness, so I would definately expect a larger gain when compared with a "typical" Luxeon. Add to that getting some better Seoul P4's, and you have some worthwhile upgrades.
The Cree XR-E in the A3 seems to be a pretty good lottery winner...excellent warm tint and spectacular output. The NG1000 drives the LED very very hard, though.
I'll be honest in that I'm really disappointed in the results. I don't think it is because the emitter is not focused properly...the beams are exactly like their Luxeon counterparts. I think it is more on the line that
the LED's I received were just really bad :mecry::mecry:
I know these Seoul P4's definitely have potential, given by the readings from my S27-PD
S27-PD high(525ma) 4900 spill 60
The emitter in that light has a great tint and incredible flux as well.
I'm going to try to find a better source for the Seoul P4's...perhaps photonfanatic will get some better LEDs...
Update: See post 37 for new info
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