Please identify this emitter (with beamshot)

[Paul Baldwin]

Hi,
I just received some C30 torches from DX. They are sold as containing Cree P4's. Some of the torches however contain led's with a different surface to the Q4, Q5 and
R2 I have. The mystery led package itself looks very similiar to the other Crees I have.
On a light meter the emitter below produces more light than a Q5 when fully focused. I tested using the same batteries and holder in quick succession. Is this because the actual die itself is smaller than the Q5?
Thanks

Paul.

 

[R33E8]

Could you post a picture of the actual emitter?

 

[saabluster]

Hi,
I just received some C30 torches from DX. They are sold as containing Cree P4's. Some of the torches however contain led's with a different surface to the Q4, Q5 and
R2 I have. The mystery led package itself looks very similiar to the other Crees I have.
On a light meter the emitter below produces more light than a Q5 when fully focused. I tested using the same batteries and holder in quick succession. Is this because the actual die itself is smaller than the Q5?
Thanks

Paul.

Thats a Cree XR-C.

 

[Paul Baldwin]

Thanks saabluster I'll look it up now.

Paul.

 

[Nos]

hmmmmm, does it throw better than a xre?
a smaller die size does not mean that it has a higher surface brightness too.
the die will jsut be smaller but not brighter, right?

 

[yellow]

On a light meter the emitter below produces more light than a Q5 when fully focused. I tested using the same batteries and holder in quick succession.

that image of the beam is good for nothing - when it comes to identifying a led.
Can You identify a car when the pic shows the beam its lights give?

but: looks like an XR-E with an aspheric, so could be an XR-E as well as the smaller XR-C


as to output: do both run on the same current (power)?
When a "smaller" and "less good" P4 gets more spice, it will outshine a newer bin with ease, no magic.

 

[bshanahan14rulz]

yes, I can identify some cars at night with nothing but seeing their lights. It's a lot easier to identify them with beamshots on walls, though. S2000 look awesome at night coming at you. *drool* but I digress, I am simply a light addict.


It's an XR-C, if you look at the pattern projected on the wall. note that what I am assuming is a current spreader only has two loops. XR-E has three.

smaller chip handles less current equals less maximum light output.


here's a smiley:

 

[Bullzeyebill]

yes, I can identify some cars at night with nothing but seeing their lights. It's a lot easier to identify them with beamshots on walls, though. S2000 look awesome at night coming at you. *drool* but I digress, I am simply a light addict.


It's an XR-C, if you look at the pattern projected on the wall. note that what I am assuming is a current spreader only has two loops. XR-E has three.

smaller chip handles less current equals less maximum light output.


here's a smiley:

It would be at least a XR-E P4. DX has been pretty good about identifying their Cree bins. The P4 LED is very reasonably priced and can be had in DX's inexpensive lights. I have a Cree P4 drop in and it is no slouch.

Bill

 

[Paul Baldwin]

After searching xr-c I found this thread http://www.candlepowerforums.com/vb/showthread.php?t=185039 I had tried googling cree led images btw and visited crees site but couldn't find a line up of different emitters. From that I am now positive that it is a Cree Some of the emitters in the other torches are definately xr-e's tho!

According to We-lights info they are only rated to 500mA they may well be severely over-driven? Looks like I'll have to compare the current draw as yellow suggests.
The projected die size of the xr-c is roughly 2/3rds the size of the xr-e, using the same torch and lense as a test-bed.

Paul.

 

[Marduke]

yes, I can identify some cars at night with nothing but seeing their lights. It's a lot easier to identify them with beamshots on walls, though. S2000 look awesome at night coming at you. *drool* but I digress, I am simply a light addict.

Not by looking at the headlights themselves, but by looking solely at the beam the cast....

 

[bshanahan14rulz]

ah, marduke, that is even easier if the beam is cast on a wall! but I'm only talking about HID projector lights. each has its own distinct beam pattern. TL has an interestingly shaped foreground, S2k has a very sharp cutoff with larger step, rx330 has a cool curved step, LS430 has an amazingly wide pattern, but like I said, I'm an addict ;-) With LEDs through aspherical lenses, you can see the shape and patterns on the dies. HID projectors, on the other hand, use same bulbs, but shape the light differently depending on the projector. If you ever get interested in automotive HID, check out hidplanet.com/forums for all the info you will ever need

Anyways, I think it's an XR-C.
Supplemental reading:
post with pics of xr-c vs. xr-e emitter:
http://www.candlepowerforums.com/vb/showpost.php?p=2839462&postcount=118
two types of LED chips Cree offers, with the two different styles of current spreaders:
http://www.cree.com/products/pdf/CPR3DF.pdf
http://www.cree.com/products/pdf/CPR3CR.pdf

 

[Paul Baldwin]

Thanks for that, according to the doc above for the ez700 series the maximum current is 750mA, hopefully they will not burn up too quickly?
I can't believe how much they vary! Using the same battery pack I tested 3 lights fully focused in the order below.
1. Upgraded Q5 @1m = 11,000lux and 0.8A
2. Xr-c @1m = 8,600lux and 0.47A
3. Xr-c @1m = 13,400lux and 0.86A
At the end of my quick tests with a cheap light meter the battery pack was showing 4.1v. Using 3x Uniross AAA 1000mA cells.
I'm thinking no 3 above might work quite well in the aspheric mag I have?

Paul.

 

[65535]

With lensed aspheric lights it is pretty possibly to identify at least th breed of led I'll give you that. I was expecting a reflector light and would have said tough luck.

I think you got your answer. Generally you can push LED's to 125% and still maintain good life and good lumen maintenance. Start going over that and you get a bluer tint and shortening life.

 

[Timmyns]

Hi guys. I have just bought one of these flood-to-throw flashlight locally and I don't think I got a Cree LED inside. Can anyone help me identify the emitter?

Uploaded with ImageShack.us

 

[saabluster]

Hi guys. I have just bought one of these flood-to-throw flashlight locally and I don't think I got a Cree LED inside. Can anyone help me identify the emitter?

Uploaded with ImageShack.us

Osram Platinum DRAGON I believe.

 

[Timmyns]

That's the one, thanks! :twothumbs

Not too pleased with the specs though, nor with the fact that is was sold to me as containing a Cree. Should I return it?

 

[saabluster]

That's the one, thanks! :twothumbs

Not too pleased with the specs though, nor with the fact that is was sold to me as containing a Cree. Should I return it?

Umm.. returning it is up to you. Do you like the light? If so what's the problem?

 

[Bullzeyebill]

Hi guys. I have just bought one of these flood-to-throw flashlight locally and I don't think I got a Cree LED inside. Can anyone help me identify the emitter?

Which brand flashlight?

Bill

 

[Timmyns]

The light is fine, but I don't think I am getting enough lumens or efficiency as I would get with a Cree. Problem is that I don't really have anything similar to compare it with.

No brand, it's physically identical to DX C30 except it has Osram emitter instead of a Cree.

 

[vickers214]

i have had that emitter in a DX Flood to throw light,

http://www.dealextreme.com/details.dx/sku.32722

I was told it was an Osram Golden Dragon, and yes the crees in other aspherics from DX are brighter, i have had the C78 and SmallSun C85 and Romisen RC-29, but they have a Deathly Blue Tint, and the tint on the Osram is more of of an Incan yellow type tint, depends on what you like?