Purify your environment with the Glastbury Pillar Salt 7.8" Table Lamp. The lamp is composed of salt crystals with an iron gate cage. The salt rocks are hand mined in the mountains. When the lamp is turned on, the light from the provided bulb heats the salt that will purify the surrounding air. The ions are also known to increase blood flow, improve sleep, increase levels of serotonin in the brain, and calm allergy or asthma symptoms. Each lamp is unique in size and shape due to it being hand mining. Most lamps are around 8" H and 6" W and long. A 15-watt bulb is included with a UL listed cord. Manufacturer does not recommend exceeding 15 watts. The cord and bulb must be assembled into the lamp. Simply insert the bulb into the socket, then squeeze the metal hinges toward the bulb and insert this into the bottom of the lamp.