Bare XM-L on left, underside on the right showing the + & - contacts, and big thermal pad in the center
XM-L and XM-L2 share the same dimensions on the contact pads on the bottom, they can be interchanged on any board that uses the 'XM-L' layout. There are other brand LEDs that use the same basic footprint and they can all be used on the same boards.
It certainly is a part of the LED. I think the actual name for what we normally call an "LED" is an LED package.
The actual Light Emitting Diode part of the package is the die, so technically, lionheart wouldn't be wrong in asking what is the green thing that the LED is sitting on, cuz that would be another way of asking what is the green thing the die is sitting on.
But generally, I think we refer to the entire package as the "LED" and not just the die.
No problem, you’ll learn. Just keep in mind this can be a very technical hobby, like cars or guns, or like physics and chemistry, and terminology can sound similar for different components, so the correct terms are important.
When the LED are off you can see darker color when the tint goes to warmer tint (mistaken doxa,infact it is cooler).
Cool white are lemon yellow, warm white is orange because there is more phosphor on the die.
Wow, I’m learning in this thread…didn’t even know the SC52 came in a XM-L2 emitter, I thought only the brand new SC600II’s did. I guess it’d make sense for them to update their emitters across the board.
The SC52nw is xml2t6. The SC600II was xmlu3, as were the S6330 lights. The SC52 cw/regular, which came out a long while back, was also xmlu3.
All of the newer lights coming out from them now seem to be xml2, which makes sense.
Right now I'm anxiously awaiting my SC600II NW, with the xml2. Cellguy has the XMLu3 versions for sale pretty cheap. I know intellectually it's only a small bump, but I also enjoy warmer tints more.
I tried a pic with XML2 4C, 3B, 3A, & 1C, cropped out everything but the dies, and I couldn't tell them apart. If anybody wants the full size version to play with in photoshop, right click/save as--> http://75.65.123.78/Dsc06275.jpg