If the reel information picture is correct and updated: the package date of the S3 3D is april2015, while the S4 2B (that is currently new style at intl-outdoor) has an earlier packaging date of februari 2015.
I can do that no better than anyone else: if the led has the old-style appearance, it will have the old-style throw increase upon dedoming, cooler leds a bit more improvement than warmer leds.
Osram’s top die illuminance led is the 3rd gen. Oslon Square, FmC has gone at great length trying to dedome it and checking throw, without getting close to the old style S4 2B.
It has been said before: We are NOT Cree’s target customer, and we are NOT even a large portion of their sales worldwide. If they were to care about us, it would be out of the kindness of their hearts, because we don’t have enough financial pull to matter.
I would like to tell them to return production process to previous state but who am I and who we are??? That is real question….
Maybe the best answer is from DAVIDEF:
It has been said before: We are NOT Cree’s target customer, and we are NOT even a large portion of their sales worldwide. If they were to care about us, it would be out of the kindness of their hearts, because we don’t have enough financial pull to matter.
The new S4 2B that you tested had a 30% drop in lux, but the one that I tested had much less than that, I would estimate within 10 or 15% of the old S4.
Like I said, there seems to be a large variation in Vf for the new S4. If you get one with a lower Vf like I did, the performance is quite close to the old S4.
I would not recommend new S4 2B to anyone… But if people want to try than why not? Myself and quite a few forum members here are heavily disappointed with this emitter.
But luckily and thanks to Wkhchin81 i managed to get some of good old XP-G3 S3 2B emitters so I’ll reply soon how they performed.
LI, I wasn’t saying you were the only one who had an under performing new S4. I’m just observing that the new S4 emitter that I bought performs very close to the old S4. So if you get lucky and get one with a low Vf, it will be a good performer.
Until then I made 6 pills with Djozz FET driver and XP-G2 S3 2B from wkhchin81 and thank you very much Sir for selling me some. All necessary bypasses done.
Current draw from 3.95 - 4.1 (none of them pulled more) measured on uni-t clamp meter.
Performance all around 200kcd in UF1503 host (usually in same host I have 220-240 kcd with old type G2 S4 2B), tint and size is same as old S4 2B.
That is good and I am quite happy While they have only about 10 –15% performance drop they behave very nice and stable with FET driver achieving maximum performance at only 4A draw which means that battery will last longer.
So even lower current draw than old S4 2B, and 10-15% lower performance.