I don't consider the light output from the Busch & Muller Ixon IQ Premium to be adequate by itself at 30 mph. It would provide light ahead of your path for perhaps 2 seconds, certainly less than 3. That's not good time to see and react to conditions ahead.

I've used the Ixon IQ Premium. It does put a greater percentage of its light onto the road surface. That may or may not be desirable when you're riding off road. But I want more lumens, which led me to the Lezyne light when I saw it on sale.

The Ixon IQ Premium also would not be as handy as a flashlight. But it does use AA batteries.