LETS FIND this high flux LED?

At this year's shotshow I was amazed that Seoul Semiconductor's LED's blasts all of Lumileds products in terms of performance and price (30% less then Lumileds latest pricin). I mean a 5W LED with 170+ Lumen, or 2.5W with 103 Lumen, or an 1.2 Watt with 52 Lumen is pretty impressive.

I talked to PK about it asking him why he doesnt switch to Seoul Semiconductor with all their LED products. He said that there is even a better company out there. I then asked which one, he said he will tell me next year.


Anyone know who he is talking about - brightest 3W or 5W LED - what company is better then Seoul Semiconductor?

How does 420 Lumens @ 700ma sound?
:huh:

Holy Photons Batman !!

Can the Osram be used in a Jil size flashlight ??

now we are talking... anything in the 3-5W range?

700mA is one thing but what is the total power consumption?

Be aware!
They put the yellow coating directly on top of the chip = bad life time

PhotonWrangler said:

How does 420 Lumens @ 700ma sound?
:huh:

Click to expand...

PhotonWrangler said:

How does 420 Lumens @ 700ma sound?
:huh:

Click to expand...

And about 15W power consumption...
No more efficient than a LuxIII.

Now, if that 6 dies in series ostar comes at the same price as a LuxIII, then it's interesting.

Interesting?

Well, to make cheap LED based lamps

The thing that does not make sense is that their lumen rating is different whether they use a reflector or not. A Lumen measurement shouldn't be effected by that? Or can anyone explain this? I thought Lumen measures the total amount of light emitted so using a reflector should actually decrease the lumen instead of increasing it.
I can't imagine the OSRAM guys not knowing how to measure Lumen so anyone know why?

Why not Seoul? Well for one, 52 Lumens (typical)? I find that hard to believe as I would doubt Cree is selling them better die than for their own chips. You can get the lumens up by going with a high (not necessarily desirable) color temperature. The 2.5W and the 5W could have better thermals. Seoul life is not fantastic when they get hot.

Of course there is the fact it is not conformal coated for the phosphor and hence you get funny color rings with an optic.

Other than that, yes they are cheaper, but I guess it comes down to reliability and light quality.

Semiman

I think Surefire is only using them for their 5mm LED's not the 3 or 5W - however there must be someone else out there that has better performances.... and my guess is that Surefire will be using them this year...

I'm wondering about the phosphor issue as well as heatsinking. Even so, I hope to pick up a six-chip version just to play with!

are there any specsheets out of that six-chip version.... dimensions etc....