Hello everyone

I'm having this work related commute on Tuesdays, where inevitably I have to go by the side of a highway, sometimes at night.. Last week I saw a motorcyclist with a VERY potent light on the back of his helmet, looked fantastic for getting him noticed.
I'm wondering if there's something just as good for bicycle helmets, perhaps even an adaptable handlebar light? (I'm looking for something potent, reliable, sturdy clamp, etc)

Thanks much for your opinions



* sidenote_ Here's a phone pic of said highway, coincidentally I took a picture, as I completed my first recorded 1000 miles! (in 3 months, since January)