Originally Posted by
cyccommute
A question about the XM-L T6 LEDs. Are they used as a single LED or as an array? Obviously, they aren't being operated at single LED at 3 amps. A more likely current draw is around 1.5 A or perhaps even around 1.0A. From the sheet, that puts the lumen output from around 550 lumens to 380 lumens. If you are operating an array of diodes, wouldn't that get the lumen output closer to the advertized level.
I've owned Magicshine 900, the 1000 and now Cree LED lamps that have noticeable differences in output. I've run them all side-by-side and there is definitely a difference in intensity.
I think member pierce is correct. The XML is a single LED on a die with an array that are link together. You can see about 6 of these arrays where each one is a rectangular shape. Unlike the older MS900 P7 where the P7 have 4 LED place on the die, the XML looks like maybe 6 arrays of LED. Not sure if what I stated is correct but someone who is more knowlege may provide a better answer. I posted a picture of the LED while it is lit up. You can see the six row that are separated from each other.
The MS900 P7 is only about 500 lumens out the front and has a much greater spill. The XML in most lights gives out about 700 to 850 out the front lumens. The hot spot and corona is much more intense making the lights much more useable and brighter.
