A mobile, mains electricity (AC-powered) lamp intended to emit red light of high stability with a narrow spectrum (e.g., 630nm) for photodynamic therapy (PDT) applications on multiple anatomical sites (e.g., face, torso) to treat skin disorders such as non-melanoma skin cancer and precancerous lesions of the skin. As a component of a drug-device combination therapy it is designed to selectively activate a photosensitizing agent at the specific anatomical site requiring treatment, thus providing anatomically specific PDT. This device is intended to be used by a healthcare professional in a clinical setting.