LUCA LIPS SPF 30 Sunscreen, Critical Wavelength 373 nanometers. The Ultimate in Broad Spectrum UVA/UVB Protection
LUCA is the best UVA/UVB sunscreen available in the United States, because our formulations contain Polycrylene, a novel Avobenzone stabilizer and strengthener.    Avobenzone provides great UVA protection, but without the addition of Polycrylene, it begins to breakdown after 10 minutes in intense sunlight.  In addition to excellent UVB coverage rated by familiar SPF ratings, LUCA is the only product in the United States to voluntarily place a critical wavelength value (see critical wavelength below) on our label showing our level of UVA protection.