Philips Lumea only flashes when it is in full contact with the skin. The integrated UV filter ensures that the light only affects the hair and not the skin. If your skin is too dark, the skin colour sensor prevents the device from flashing.
To get used to Philips Lumea, you first make test flashes near the area that you are intending to treat and continue with the highest setting that still feels comfortable and does not give side effects.
We recommend using the Lumea in a well-lit room.