There are many different types of oil diffusers in the aromatherapy market. One popular type of diffuser is the lamp ring. This is a terra cotta ring that is set on a light bulb. The bulb acts as the heat source which diffuses the oil that is placed on the lip of the lamp.

You have to be careful placing your oil on the lamp lip. If any oil gets into the bulb, the bulb may break. The steady heat from the bulb also destroys some components of the oils. Therefore, the oil may not be as effective as it should be. Hence, to get the most out of these oil diffusers, make sure they are used properly.