This reproduction carbon filament bulb is hand crafted to evoke the look of the historic Edison light bulbs. This historic bulb is made up of a series of up and down filaments which make up a "cage" around the center glass pillar support. Bulb has a standard Edison base and measures approximately 5-3/8" tall (including the 1" base) by 3-3/4" in diameter. The light bulb emits a nice decorative glow and can be used in any medium base socket, with or without a shade, to create a dynamic light art. This was a very popular bulb in the early days of electric lighting. This light bulb is great for authentic lighting concepts and exposed socket fixtures. Rated for 30 Watts at 120 Volts and 60 Watts at 240 volts.