Aromatherapy Lamps come equipped with a small metal cup at the top of the salt lamp where essential oils are added and diffused from the heat of the Light Bulb. Natural Style Himalayan Secrets Salt Lamps are made with premium Salt Crystals which date back millions of years before mankind appeared. These Salt Lamps can be set up in your workplace, your bedroom, a meditation area, or a living room. Dimmer cord and 25-watt bulb included.