Using an unscented lamp fuel a catalytic diffusion lamp is surprisingly effective in eliminating bacteria and various odors (pets, food, tobacco). With fragrance added to the isopropyl alcohol based lamp fuel the catalytic burner lamp becomes a fragrance lamp, diffusing aroma into the air while it purifies. Some perfumes are based on natural aromatics ( essential oils ), giving the lampes an aromatherapy application as well." FRAGRANCE LAMPS , also known as Effusion Lamps , exchange fragrance for unwanted odors. Fragrance lamps purify the air you breathe, eliminating germs and bacteria while infusing sensational fragrance throughout your home or office, creating a healthy, relaxed, and soothing atmosphere