How much role do battery specs play in the TM16's output on turbo?

LED Flashlights – General Info 18650 Flashlights
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A quick “human eye” comparison between my Nitecore EA81 (XHP50; rated 2150lm) and my new Nitecore TM16 (4xXM-L2; rated 4000lm) doesn’t show much difference in output. While I understand that the eye won’t readily distinguish between small changes in brightness, I would have thought the ~2x increase from 2150 to 4000 would be easily visible. Indeed, when comparing my TK45 (760lm) with EA81’s mode-4 (1200lm), the difference in brightness is hard to miss and that’s only a 60% increase in output.

I haven’t measured current in the TM16 but this has me wondering if my batteries might be a bottleneck. I’m using 3500mAh LG MJ1s in the TM16. Ostensibly they’re rated for 10A discharge while I’d be surprised if a TM16 needs more than 4A. So at least on paper on paper the batteries seem to be a good match for the light?

Any ideas?

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Batteries do make a difference, but you might only be able to detect it with a light meter.

I wonder if the difference from 760 to 1200 compared to 2150 vs 4000 is more noticeable because at the 2150 lumen level your eyes are getting saturated.

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Dont bother m8, use batteries that you allready have and be happy : the difference in candelas between Panasonic 2900PF and LG HG2 in TM16 is about 5%…you wont feel a thing …plus it aint a single battery flashlight - mj1s are good batteries