Just thought I'd share this nifty little idea I had today for using the lightforce lamp without drilling a hole through my daily runaround shooting wagon roof.
Use a double glass sucker handle thingy and take one of the suckers apart. Using the hole already in the plastic housing, attach a bit of strong board or formica approx 4" wide and the length to suit your arm. Wack a hole through the formica for the lightforce and handle with a hole saw, bolt it together and there you go.
Hopefully it'll sucker to my roof when I try it later and stay put while moving the arm about,