I can only really go by Matches test on the XML2 led on copper test. At 5100ma I would be at 4800 lumen. I like this light a lot because the reflectors are deep and it really throws well! I believe there is not a true way to convert lux to lumen?
I didnt think to do the math. I am just measuring current in real time. I could have a fualty multimeter. Or maybe I’m not using heavy enough wire on my meter to test?
The 5.75A was a bench test with a Pb 12 volt battery. The assembled test was 5.1A at the emitters. The current test to the emitters was done at a different time when I did the tailcap current test. I do have another meter. I can try and test the output to the emitters and the tailcap at the same time. What efficiency are you using for the driver?
I just did another tail cap current read. I used 10 gauge tin coated copper wire as short as I could I got a tail cap reading of 4.54A. That should be correct. I should be a little more thorough in my tests. I just get so excited to see such a gain in performance and I love to share my results. Thank you for allowing me correct my accuracy.