In the early days of electrical lighting, inventors such as Thomas Edison tested and retested as they searched for long-burning filaments. In 1890, the filament choice was carbonized cotton. Bulbs have a tungsten filament, which is used to reproduce the single hairpin loop of a vintage design. A perfect accent light, position it within a clear shade or exposed socket to enjoy its shape and ambient glow. Crafted to preserve the look of early 20th-century lighting, the incandescent designer gold Oro 40W 120V medium base bulb is the perfect way to brighten up a room. Please note, that these bulbs are not as bright as modern bulbs of the same wattage and are recommended for exposed socket fixtures. Glass has a gold amber tint that can vary in degree from light to medium. These bulbs can be dimmed.