The luminaire has a molded reflector body comprising a reflective coating with light reflective particles and a binder and having a substrate side and an outer surface. It can be used for simulating a construction process in a situation of tunnel digging or coal seam mining, for example, for collecting water inrush omen information, and for studying on surrounding rock mechanics, deformation and collapse column seepage rules during construction, thus facilitating safe construction and early warning in practical engineering. The casing body is formed with an air passage communicated to an exterior of the casing body, so that an air stream is created within the waste toner chamber. For certain cases, this is possible, as not necessarily one specific data object has to be retrieved. The compartments have different pressures therein and in a preferred embodiment are separated from each other within the apparatus to treat the food product on a continual basis, as opposed to a batch-by-batch basis.