There's no way you will be able to run the K in a cabinet, and even in a large cabinet/closet, you'll need at minimum a PAIR of duct-booster 6" fans in-line to move the air. You will probably want to cool the lamp on a separate duct circuit, and insulate the ductwork that is exposed inside the cabinet, and then do the cabinet exhaust with another set of fans.
Mediterranean plants such as rosemary grow well in warm, bright grow cabs, and will help hide the odor of your herb.