A light assembly comprises a fixed mounting plate on which there is positioned a variable resistor, a rotatable member including an arm engaging the variable resistor and a lamp subassembly pivotally mounted to the rotatable member and keyed to the rotatable member such when the lamp subassembly is rotated...http://www.google.ca/patents/US5951155?utm_source=gb-gplus-sharePatent US5951155 - Variable intensity light assembly
