[Review] Convoy M21J || Luminus SBT 90.2 , 2 x 21700, TIR || Output measurements and outdoor beamshots

[mcjtom]

Convoy M21K driver

As I’m waiting for the M21K LHP73B, I keep thinking about SFT90 version or a modded SBT90.2 flavour of it. All other aspects aside, I was curious how these three could compare thermally. So I looked at @koef3’s tests of the three (the SBT90.2 is not on the master list). From the 1Lumen review of the LHP73B I figured the TIR efficiency may be some 85% and assumed it applies to other emitters. Then also assumed that the output current to the LEDs on turbo and super-turbo is the nominal 10 A an…