Globe Electric's Incandescent vintage Designer Labo 40W clear 120V medium base bulb. 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. Today, Globe Electric's bulbs have a tungsten filament, which is used to reproduce the single hairpin loop of a vintage design the designer Labo bulb is a prestigious accent for any decor. Position it within a clear shade or exposed socket to enjoy its shape and ambient glow. This Edison-inspired bulb is a Steampunk favorite with its glowing cage-shaped filament surrounding central glass support. Crafted to preserve the look of early 20th-century lighting. Please note, these bulbs are not as bright as modern bulbs of the same wattage and are recommended for exposed socket fixtures. Glass has a goldish amber tint which can vary in degree from light to medium bulbs can be dimmed.