The invention relates to an item having at least one illumination area. The item includes at least one glass-ceramic substrate and, in addition to the substrate, at least one optical guide, said guide being coupled to at least one light source on a side outside the illumination area. In addition, at least one means for extracting radiation emitted by the source is provided in the illumination area. The invention also relates to the production of the item and to a cooking apparatus comprising such an item when it is made from a glass-ceramic hob.