Which statement is FALSE with respect to a 60A19W lamp?

The statement that "60 describes the output" is indeed not accurate with respect to a 60A19W lamp. In the context of light bulbs, the "60" in this designation refers specifically to the wattage of the lamp, which is an indication of the energy consumption rather than the light output directly.

Light output is typically measured in lumens, and while wattage can give a rough estimate of brightness based on historical incandescent lamp performance, it is not a precise representation of light output. Therefore, when discussing the characteristics of this type of lamp, focusing on the wattage to define its output may be misleading.

The other components of the designation are correctly interpreted. The "A" indeed refers to the shape of the bulb, specifically an 'arbitrary' shape in this case. The "19" denotes the diameter of the bulb in 1/8ths of an inch, equating to approximately 2.375 inches. Lastly, "W" designates that the bulb has a frosted or white coating or finish on the glass, affecting both aesthetic and functional aspects of the lighting. This understanding illustrates the nuances of lamp specifications and the importance of each part in accurately describing a light bulb.