I mount a torch to my head on a soft adjustable cap with velcro.
I sew the velcro on to the top and then use some elastic loops with the other bit of the velcro to position it where I want the light.
Well, it not actually velcro(tm) but its some cheap hook and loop velcro(tm) style straps.
Weight wise, a L2D is perfect. Anything more and the balance is a bit off. Anything less is even better.
I'll see if I can do a photo of it tonight.