Each subject will be exposed to three (3) sets of three (3) patches containing Tazarotene Foam, Vehicle Foam and a Blank Patch (no study product). Each patch set will be applied to randomized sites on the subject's back. Patch sets will be removed and evaluated after 24 hours of exposure. The exposed patch sites will then be irradiated (exposed to light) and evaluated at 1 hour post irradiation and at 24, 48, and 72 hours.