If you endeavor to unscrew it, you may perhaps unscrew the nut at another close in the tube instead. This will allow the parts of the lamp physique to come back aside, but that isn’t a huge problem. Just use pliers to twist The bottom from the tube (Image 2), http://paxtonpfrcp.jaiblogs.com/20115563/the-definitive-guide-to-vacuum-fix-boulder