Lava Lite 6812 27-Inch Heritage Collection Neon Grande Lava Lamp with Black Base, Neon Green Wax/Clear Liquid The Lava Neon Grande is more than a conversational piece for any room This impressive Lava Lamp is the largest Lava Lamp currently being produced Premium materials used for base and cap, 100 watt (R20 shape) light bulb included Dimmer switch allows control of start time refer the manual below under the product description for instructions regarding the product use