The field of the present invention is that of oral pharmaceutical forms of at least one active principle AP whose solubility varies greatly as a function of the gastric pH, and also treatments and administration methods relating thereto. The use of a directional light source and the adjustable reflective material provides an increased and more diffused lighting effect while eliminating the otherwise experienced hot spots or dark spots common in prior art light assemblies. The airbag inflator has an exhaust port end extending external of the module housing for venting inflation gasses directly from the airbag inflator externally of the module housing.