IPL treatment works, because the energy of the light will be absorbed by the melanin (type of pigment) of the hair. Since blond, grey and white hairs do not contain any melanin IPL treatment will never work on these hair colors. Red hair contains a different type of melanin which is not responsive to IPL.
Lumea is also not suitable for naturally dark skin tone, as it can cause skin damage, such as burns, blisters or discoloring. Check the skin types and body hair color chart to see if Philips Lumea is suitable for you. A unique skin color sensor is incorporated in Philips Lumea models SC1981-1985 and SC1996, SC1997, SC1999, BRI86x, which ensures that a pulse will be emitted only on suitable skin colors.
Please perform a new skin test after tanning to determine the appropriate light intensity setting.