This Tensor Model 1500 Desk Lamp is a great example of mid-century modern design. It was designed to provide high-intensity, low-voltage light that focuses a narrow beam on a book or work surface. The lamp is tested and working, and comes with a working 12-volt incandescent bulb. Replacement bulbs can be purchased at an auto parts store or online (#93 incandescent 12V automotive bulbs). Use of any other type of bulb may damage the lamp.