Groovy 13" Mini Motion Lamp - 25 watts (Silver) (ETK-6122) Similar to Lava brand lamps Uses a 7.5-inch glass bottle filled with clear blue-green liquid, with a waxlike substance inside which moves up as it is heated by the 25-watt, 120V mini-flood lamp hidden in the base, then goes back down as it cools off near the top. Waxlike substance is white Intended for use in countries with 120VAC electrical systems 25 Watt 13" mini motion lamp - Similar to Lava Lamps