These beautiful melo melo shell night lights are made with a real melo melo shell, also known as Indian volute or bailer shell, that has been drilled, attached to a round wood base, and a light inserted inside making a beautiful glowing nightlight. The light socket takes a standard candelabra sized bulb, comes included, which can be found at most any store. This is the most common size of nightlight bulb. To change the bulb, reach under the wood base and pull out the socket, replace bulb, and then clip socket back inside. The included white cord and socket has an inline on/off switch for your convenience. Total height of these nightlights is about 8 to 9 inches.