Globe Electric's Incandescent vintage designer 40W Vintage Edison S60 Squirrel Cage Incandescent Filament Light Bulb with E26 base. 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. Globe Electric’s bulbs have a tungsten filament, which is used to reproduce the single hairpin loop of a vintage design. 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 a 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. These bulbs can be dimmed and have a lifespan of 3000 hours.