You should try to wait a few days before exposing your face to the sun after an IPL photofacial treatment. If you do go outside make sure you have on a good, broad based UVA/UVB sunscreen (and a hat if possible) so that your skin is protected from the sun’s damaging rays. The better protected your skin is from the sun, the longer the photofacial results will last.
MANY high SPF sunscreens do not adquately protect against UVA rays which are responsibvle for the majority of photodamage. I would not recommend going in the sun without a sunscreen containing Zinc Oxide 7 % or greater as well as a hat after photofacial. Otherwise you may see your pigment return and be unhappy with the results. This should become a lifetime practice.