In the jungle of high CRI, easy handling, soft beam angle, price, weight, size, Lumen, Lux, customer service,....
another factor could be the width of the beam angle too.
The wider the beam angle, the less Candela you get. Lumens to candela (cd) conversion calculator (rapidtables.com)
I use lights with 9000Lm output with 110 beam angle. Most of the time i use them at 2nd highest level. I never felt like getting stronger lights so far. Altough i would have much longer run time with stronger lights, if i use them at about the same Lm level like i use my 9000Lm lights now.