I'd say so. Very hard to tell the difference between 600 and 900 unless you have the lights side by side, and if they have different tint, even then it's hard.
Thank you :)
Looks like this one:
http://intl-outdoor.com/qlite-reva-71358-multiple-modes-circuit-board-304a-p-710.html
Looks like mode memory is fixed.
Oh well, still a great light :)