XP-E2 or G2 dedome for max lux throw?

[Lightbringer]

@Jerommel

I can find Djozz’s XP-E2 test, but i think he did test it, but i found a similar test of XP-E2 just now on DTP copper MCPCB and i.m.o. it’s not really worthwhile to exceed 2 Amperes.
Since the XP-G2 has roughly twice the size die, and it does pretty well above 4 Amperes, it will out throw the XP-E2.
But indeed, you’re not gonna get too far with a single cell linear driver, forward voltage is too high at that current.

Emitter Test Results pt4: XML2, XP-E2, XP-G2, and Nichia219! (along with sinkpad tests)

Folks, Long time no see... Since most of you are now aware of my testing procedure, I'll be brief here. The following is a test of the Cree XML2 on a standard aluminum 20mm star, along with another xml2 mounted on a copper sinkpad. (member vestureofblood was kind enough to send me out these for testing). [image] Graphs speak louder than words, so here they are. The first one is the XML2 on a standard star, followed by a comparison graph between a standard aluminum star and a copper sink…

Light output is still rising somewhat at 1A, already almost flat at 1.4A, and peaks at 1.6A. More current, and light drops.

I don’t have any XP-E2s on DTPs, so on a regular Al star, 1A is fairly unstressed, and 1.4A is already peaking.

XP-G2 on Al is peaked at about 2.6A.

Cu DTP changes all that, of course. Smoke ’em if you got ’em.