This is a test of commonsense. Complete the next sentence:

How to maintain a pale complexion
Apply sunscreen daily.
Sunscreen should be applied every day, regardless of the time of year. Spf 15 or above is recommended.
In case you're uncertain as to which type of spf you need, remember that the number of spf helps to determine how long the product will be effective in protecting you before having to reapply it. In other words, it helps you to figure out how long you can stay in the sun without burning.