As a result of his work at the University of Cincinnati Dr. Sperti founded Sperti
Sunlamp in Cincinnati, Ohio, to manufacture ultraviolet bulbs and appliances for the
general public. From 1933 on Sperti Sunlamp produced 100-Watt screw-in bulbs
consisting of a tungsten filament and a small low-pressure mercury vapour arc
device, a so-called blended lamp. The lamps were primarily used as reading lamps.
They did not produce a tan but were intended to provide the user with full spectrum,
healthful radiation for everyday use.