Donnie and I also thought about mounts to allow the lights to mount to the side of various racks to serve as illumination for camp sites. We tried them in various positions on the Gobi rack.
There are many different racks and places on them one might want to install camp lights, so designing only one or two custom mounts for racks probably won't serve all the applications. So here's what I'm thinking... there's an industry-standard mount called AMPs (
http://www.mountguys.com/amps-pattern-mounts/) - it's basically a 30mm x 38mm rectangular bolt pattern, and it's used on all kinds of electronics like GPS's and other gear.
An adapter could be made to allow the light pod to bolt up to the AMPs standard, then there are hundreds of mounts available off the shelf that could be used. For example, here's a mount that attaches to a round tube like the side tubes of the Gobi rack. These could be used, plus a swivel arm which would allow the lights to be positioned exactly as needed for the campsite.
The ball mount on the left is an AMPs-compatible ball that would go on the light pod; the mount on the right is a basic mount that would accept the ball.
There are dozens of other mounts that accept that ball that could be used, here are a few examples. Some of these would work very well on the Gobi, and some would work well on larger bars - I passed a Jeep yesterday that had a rack with what appeared to be made of 2" tubing, some of these would fit that, and the one at the lower right would fit large roll bars and bull bars. In the upper left is a swivel arm, which would connect the light to these mounts, they come in a range of lengths.
There are lots more at RAM (
http://www.rammount.com/components), on eBay and other places.