At the beginning of the era of electric lighting, inventors such as Thomas Edison would have researched in order to find filaments that burned for long periods. In 1890, they discovered that carbonized cotton was an ideal filament for this stain. The Globe Electric bulbs contain a filament made of tungsten and designed to reproduce the simple pinned loop so popular with the retro look. Designed to recreate the lighting style of the early 20th century. Be careful, these bulbs are not as bright as modern bulbs of comparable power and are recommended for use with exposed sockets or fixtures. The glass is tinted in gold and amber color and provides a degree of brightness that varies between low and medium. The bulbs are dimmable with a lifespan of 3000 hours. Package of 3 bulbs.