From the folks at House of Antique Hardware:
"Antique style Edison reproduction single loop carbon filament light bulb measuring 4 3/4" tall and 2 1/8" in diameter. This 1892 style clear glass bulb emits a dim reddish glow, has a 2000 hour average life and is available in 40W. The filament is hand made in the USA. Edison bulbs are recommended for open bulb antique or reproduction light fixtures as they do not provide as much light as modern bulbs of the same wattage. Great for dim mood lighting or authentic lighting concepts. The long single loop filament is delicate and not designed for horizontal or angled installation. We recommend mounting these bulbs in an up or down vertical position only."
Perfect for your Mad Scientist project. link.
Posted by Paul Overton at 3:30 PM