|Place the white Ceramic Light Ring on a light bulb, add 5 drops of fragrance oil onto the ring, then turn on the light. The bulb's heat will warm the ring and diffuse the fragrance, scenting the room with wonderful aroma. Ceramic light rings have been known to be safer and more practical then metal or brass rings. Not for use on bulbs above 60W. Contains two oil ring. CAUTION: OIL GETS VERY HOT.