I think you will want a decent sized battery so you can run the X2 on max all the time.
I have a Gloworm X2 (1150 proper lumens) and bought the SS X2 head unit for comparison.
The SS X2 light is a little whiter but is not as bright, so maybe pushing 1000 lumens.
The medium mode on the Gloworm X2 is brighter than the medium on the SS X2 and is much more useful, and is what I ride with mostly.
At max mode and with a decent helmet light the SS X2 seems decent.
Note that torchy’s picture makes it look less floody than mine appears to be.
But torchy’s pictures also make the Fluxient mini torch look better than the lower powered Exposure Joystick, but in reality the Joystick is a better helmet light.