Lights

I use 2 short velcro straps to attach one to a helmet. For the bars, there's an origamiesque trick using a length of old inner tube, plus an elastic band to stabilise. If you search for 'origami' with the 'search this thread tool' on the TNRC thread, you'll find a video.

There's also the two fish lock block available, which many people use without incident.
I should point out I took scarlett's advice on these torches and bought two to supplement my Hope. As it was such overkill I've given one of the Romisens to Hillbilly.

To sort out the bar mounting I drilled an extra hole in a mini pump bracket (Designed to fit next to the bottle cage) and cable tied it to the hope light.