Which of the following cannot be said of arc lamps?

they were very bright.

they were not suitable for use in homes.

they were the best kind of electric light.

they were not as bright as incandescent lamps

The answer is They were the best kind of electric light.

Explanation:  Before Edison and his team inventoried the lamp, electricity was already used to produce illumination through a system known as “arc lamps” - a current flowing between two electronic pressures and producing light.

However, this system was inefficient and generated a lot of heat. So as it could not be used anywhere like houses, shops etc. they were still lit by candles or lamps.

were they embroiderers?

d

explanation: