I was sent a second SR15 to test since Sofirn thought that the first batch had issues, making mine and 1Lumens graphs inaccurate, but as seen here they’re much the same, they still show similar sustained output. It must just be a very inefficient driver to produce so much heat when the SR12 uses 1x SFT25R vs the SR15 using 4x SFT25R, also that it’s much larger. It runs hot, so it’s not just due to the use of timers.
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Thanks for posting those. I hadn’t tested the replacement Sofirn sent (yep, I got one also). I did lumen test it and the output was the same as the old one. I suspected they only tweaked the stepdowns, and it looks likebfrom your tests that is confirmed.