Skin Doctors divide people into "types", depending upon how bright or dark complexion it is, what hair they have and how many freckles on the nose sit. Hence, how sensitive they react to sun exposure and how they can best protect against sun damage. Nevertheless, it is important always to creams. Because a high sun protection or sun protection factor does not mean that you, once lubricated the whole day in the sun can be maintained. The amount of sun protection factor, says only, with what value the self-protection time of the skin multiplied. For example, you are a Type 1, with a protection factor of 10 to 50 minutes in the sun to stay. They are better in any case in the shadows lifted. 
Skin Type 1: very light skin color, many freckles, sunburn now emerging, self-protection of the skin time: 5 to 10 minutes
Skin Type 2: bright color, a few freckles, sunburn quickly emerging, self-protection of the skin: 10 to 20 minutes.
Skin Type 3: light brown skin color, freckles hardly, hardly a sunburn, self-protection time of the skin: 15 to 25 minutes
Skin Type 4: brown skin color, no freckles, rarely a sunburn, self-protection time of the skin: 20 to 30 minutes