... photons with chemical and biologic process. PDT light introduce LED system uses the technology of LED luminescence, which is also ... light, around 15 to 20 minutes per time. The treatment range 1. Removal: Whelk, Macula, and Folliculitis 2. Improvement: Coarse ... operation, no need of professional training. 6. Long life time, steady capability, long continue working time. 7. No consumable materials. 8 ...