Please don’t put too much weight on my absolute values, as per usual. I think my ‘calibration’ is fairly good, at least in this 1000-2000 lumens range. Note that the HX was from Convoy, the WF2 was from Hank, and these were tested back to back a few months ago. I didn’t re-run them yet back to back with the YD5050, but a spot check said I was in the ballpark. The next batch that I receive can get a better go at it. Hopefully by then I can integrate a temp sensor on my heatsink and maybe get my Agilent DAQ fired up and collecting data for me. This way I can run fast sweeps at a bunch of different heatsink temps. I also have access to a FLIR for surface temp readings, but doubt I’ll get around to it anytime soon. I’m curious about the ‘tip-over point’ for the phosphor temps.
I’ll also sacrifice an emitter to do a phosphor free output test along with an SFT40 that is damaged already to see how much the phosphor temps are limiting the performance. I did this once before with a Luxeon HL2X and saw a massive difference in peak output current.