There is no halogen microwave. There is a halogen microwave oven bulb. (The technical term for a "bulb" is a lamp.) Some microwave ovens use a halogen lamp to light up the oven cavity. Replacing them is similar to replacing a "regular" incandescent lamp, except that when halogen lamps are being replaced, it is critical not to touch the lamp with bare fingers. Leaving skin oils on a halogen lamp shortens the lamp life and can set up a dangerous situation where the lamp might overheat.