... externally and internally. The 30-minute process ensures an improvement of five to fourteen shades. It is ... easy whitening by using 6 pieces of 5W LED with an output at 800 to1200 mw/cm2.2. Semicircular ... between the dentist and the patient.6. With an average of 10 shades, you can finish the ... :1. Wavelength: 410nm-520nm2. Light resource: 6pcs large power LED light tube3. Emission time: 1m, 2m, 3m, 5m, ...