But that doesn’t sound too bad. Nearly 100Lm/W at 30Amps ist better than the 78,3Lm/W (~8050 Lumens) a XHP70.3 achieves at 6,85V/15A according to your test.
For a LED that costs 1/4 of the XHP and delivers a much nicer tint that is not bad at all.
Just if you want to overcurrent this thing it might not be the best horse in the race, but again, the price…
I only buy a XHP70.x when I really need it, but I buy the LMP LEDs just because I want and because I want to have a certain stock of good LEDs on hand.
I just counted, I have 22 LHP531 and 15 LHP73B in stock, most on MCPCB in various sizes.