Lampe Berger by Maison Berger! Developed in the late 1800s, Lampe Berger was originally used in hospitals to remove bacteria from the air. They became popular in the 1930s in salons, and when they came to North America were primarily sold in Smoke Shops. Today people love them as they not only add fragrance to the air, they also actively get rid of odours and 68% of bacteria in the air. Lampe Berger will clear 200 sq feet in 20 minutes, but you can let them go for up to 2 hours for more persistent odours. or to clear more space. Cap it when you're finished to shut it off. Use the Neutral to get rid of odours without adding fragrance...Or mix it with a scent for a more subtle fragrance.