Ligman offers clamps as an accessory for mounting fixtures onto poles with diameters of 4" , 4.5", 5" & 5.5". Custom sizes are available upon request. The Ligman Quantum, Odessa and Jet Square floodlights are excellent choices for pole mount floodlight applications.
For tree mounting, utilizing the same floodlight options, Ligman offers a variety of treestrap sizes. See floodlight cut sheet for more details.