In the days of Joseph Swan, Thomas Edison and Nikola Tesla, around the turn of the 19th century, the incandescent light bulb was made with a carbon filament and later a Tungsten filament. The exposed filament was heated and a warm glow was produced. This was how the light bulb was made for the next century.
In 2015, the LED filament began to be mass produced, which has taken the name LED Edison bulb. It is important to make look for UL or ETL safety certifications before you buy LED Edison bulbs and install in your home or business. With Edison Mills we have a 3 year warranty on all LED filament models, and we have a 5 year warranty on non-LED filament models.