Answer
Natural or artificial daylight may be selected for suitable actinic keratoses. The clinic decides whether weather, lesion and equipment conditions are appropriate.
Sources for this answer
- Metvix 160 mg/g cream — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.