could replace the internals with the parts from a flashlight, wire it up to the controls of the hairdryer so the buttons still work. If you or someone you know is knowledgeable with electronics and soldering, if there's a blow or heat toggle for different levels of fan speed or heat-cool, this could translate to light intensity with more or less bulbs/LEDs on at a time, or colour using RGB-LEDs.

google search says "An herb is the green, leafy part of the plant. Examples are basil, rosemary, sage, thyme, parsley, and oregano. A spice can come from the root, stem, seed, fruit, flower or bark of the tree or plant"