I was wondering, I'd like to be able to use some of my wall mounted fixtures, but I don't want to have to mount them to the wall. Is there anyone who has made a sort of stand to use one as a table lamp? I saw some of the HID bulbs using outlet boxes for the housings and was hoping someone might have an idea. I know I need an outlet box, and a cord, but what for a post and base?

I made few HID posttop floor lamps, at first using bases from fans, but they were not too stable. Now i have one which does not have a base, it is just tied to the foot of a table

And where all else fails, black walled steel gas pipe or even galvanized steel water pipe works great, it's threaded so all you have to do is spin it together and then pull a wire though it, it's fairly cheap, it'll last a lifetime, there is hundreds of choices for parts like couplers, tee's, crosses, bends, unions, so you can build just about any shape, and it has a steampunk / industrial look to it.. 

For bases a car brake disk may serve you well... they are very heavy and if it happens to not be heavy enough alot of times they're stackable.. I built a room light using them: close up of the base | full view of the light.