Whats the difference in these LED's ?

ConfederateScott · Jun 28, 2008

This has probably been asked before and if it has I'm sorry, I missed it. I also searched and couldn't find the answer explained in terms I understood.

What is the difference between a R2 and a P4 and a Q5 ?

Also what does the word "bin" refer to? Does it actually mean what bin (as in box) an LED is put in as it is tested and sorted?

Is there a chart somewhere that tells what each designation is so I will know which one I want to buy?

Sorry again if this has been hashed before.

WildChild · Jun 28, 2008

457 posts and you still don't know what is a bin? A bin is a way to sort LEDs based on their brightness. P4 is dimmer than Q5 that is dimmer than R2, at the same drive level. That means that a R2 is more efficient than a P4. I don't remember the actuals lumens per watt values but I'm pretty sure someone else here does!

ConfederateScott · Jun 28, 2008

Thanks a lot. I don't mind aksin a querstion even if it do makes me look dum.

Nitroz · Jun 28, 2008

This is what you need to read up on.
https://www.candlepowerforums.com/threads/156772

The P4 could be a Seoul "U" bin p4 and not a Cree p4. The R2 and Q5 are Cree specific bins.

LEDninja · Jun 28, 2008

Cree bin# comes in 2 parts A brightness and a colour.

Here is a listing of the brightness bins.
Bin# on left, lumens @ 350mA in the middle, lumens per watt right.

Here is the colour bins for the cool white LEDs.
Look for the tint code (WC, WD, WG, WH most common in flashlights), then check out the colour in the box.

Here is the colour bins for the warm white LEDs.
5A is the only one in use for flashlights at this time.

Here is the thread listing the bins for most of the LEDs
https://www.candlepowerforums.com/threads/156772

Marduke · Jun 28, 2008

To make matters worse, Cree uses a P4 bin, where SSC makes a LED whose model is P4, and they are not the same LED.

A complete list of the popular LED's and their binning system (both flux and tint) can be found here
https://www.candlepowerforums.com/threads/156772

bob4apple · Jun 28, 2008

WildChild said: "457 posts and you still don't know what is a bin? ".

Well, he knows now because he asked the question in this forum. And now I also know, so I'm glad the question was asked.
And as Marduke said: "...Cree uses a P4 bin, where SSC makes a LED whose model is P4, and they are not the same LED."

So I'm really glad to have this information, because I was assuming that all P4's are the same...and with the large number of
members on this forum, I'm sure I'm not the only one who thought that.

The more questions that are asked, the more I learn, so keep them coming everybody- no matter how many posts you have!

Whats the difference in these LED's ?

ConfederateScott

Enlightened

WildChild

Flashlight Enthusiast

ConfederateScott

Enlightened

Nitroz

Flashlight Enthusiast

LEDninja

Flashlight Enthusiast

Marduke

Flashaholic

bob4apple

Enlightened

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