This versatile brass floor lamp with a plastic shade illuminates thanks to a 3 volt lithium battery and an LED (light-emitting diode). Both are included with the lamp. You can expect the lithium battery to as approximately 50 hours, at which time you can replace it with the Lithium Battery Set. The LED is not replaceable, which isn't a problem because it will last approximately 4,000 hours. This lamp is 1/12 scale, which is the most common scale for dollhouses and dollhouse miniatures. It means that if an object is 12 inches in real life, it is sized down to a one inch as a miniature.