Lumina Essence refers to a few different products, but most commonly describes a hair essence or perfume oil designed to enhance hair's beauty and fragrance. Natura Lumina Essence, for example, is a hair essence that tackles frizz, adds shine, and protects hair from environmental damage while providing a pleasant fragrance. Al Rehab's Lumina Perfume Oil is a 6ml blend of aromatic notes designed to uplift mood and promote happiness.