This product is made from 100% natural and hand carved salt crystals imported from the Himalayan mountains. Due to the natural excavation process, lamp shape, color, size and weight may differ. Each product includes a 15-watt bulb pre-installed within the lamp base. Beware handling lamp if left on for an extended time period. The bulb will heat up the salt and the surface area will become hot. Cable includes a twisting dimmer knob that works as a brightness control and on/off switch. When turned on, this lamp will develop a relaxing orange radiance. Great for usage in bedrooms, on workplace desks or cubicles, living rooms, dining establishments & hotels and restorative & meditative rooms.