I read the datasheet (both Nichia and Cree can learn from Philips, the datasheet is actually very readable), and I am convinced: I want these, more specific: the 3500K 80CRI ones. Who is going to have them in stock, anyone? (not Mouser or Digikey, they charge way too much shipping for my type of mini-orders).
Can someone shed some light (not literally ) why would you use Luxeon Q or Cree XP-E/2 when there are much stronger/brighter emitters like XP-G/2 XM-L/2 !!!
The data sheet is extremely readable. It really is easier than reading a CREE datasheet. BTW, for once and for all, the center pad is electrically isolated from the anode and the cathode:
Notes for Figure 2:
1. Drawings not to scale.
2. All dimensions are in millimeters.
3. The thermal pad is electrically isolated from the anode and cathode contact pads.
4. Do not handle the device by the lens. Excessive force on the lens may damage the lens itself or the interior of the device.
In small lights you still get reasonable throw with these (my XM-L2 EDC puts out 400 lumens, but can not light up the houses 15meters further across the street, my sk68 dedomed xpe2-hotrod puts out 200 lumens but lights up the other side of the -ok, little- park), and big lights become lightsabers. But if you are happy to push more than 3 amps through your emitter, I agree that the bigger emitters are a better choice, even for throw.
thanks, I figured that throw will be the only relevant thing here, but it’s just funny, on one side we are pushing more amps to led-s than humanly possible :bigsmile: , piggybacking AMC chips to absurd limits (as no limits ), making P60 MT-G2 drop-in-s and on the other side: hey look 300-ish lumens new Luxeon emitter, woooow :bigsmile:
damn it, now I will have to build XP-E2 P60, just have to see that “light saber” for myself
I recently put an XP-E2 in a P60, one domed, one de-domed. And one in a ZY-T619. For my type of use. Id take XM-L2 in most cases, and XP-G2 in a few, if throw is not good enough, dedome.
Where these small type of emitters have a purpose are in small AA, AAA,16340 type lights. Especially lights using nimh where high current is not an option.
Maybe these emitters are a good option for triple copper MCPCB too? Assuming you are limiting yourself to around 3A.
One place they could be good are in various multiemitter lights.
Yes, so the efficiency is not the reason to choose the xpe, you choose it for the die size, or better: the illuminance; output/surface area. That (mostly) determines the ability to throw. The xpe2 wins here over the xpg2 and xml2 (that is:, the xpg2 driven over 5 amps wins from the xpe2 driven to its max of 2.6A).
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) why would you use Luxeon Q or Cree XP-E/2 when there are much stronger/brighter emitters like XP-G/2 XM-L/2 !!!