Although a small step, Farnsworth used a room lamp rather than the extreme lights needed in previous attempts. He constructed a series of tubes which allowed him to transmit the image to a screen that was about seven inches. The image was dark and rather blurry but according to Farnsworth, marked “an important first step.” (Fisher, 187)
For other milestones in the development of television, see:
Source: David E. Fisher and Marshall Jon Fisher, Tube: Invention of the Television (Washington D.C.: Counterpoint, 1996), 187.