What is the rated voltage and current of a light bulb?

A bulb's rated voltage and current determines the power requirements for its normal operation, 12V/0.1A bulb is said to be under the voltage of 12V through its current is 0.1A, that is, the rated power is 1.2W. voltage is high, the bulb absorbs a large amount of electric power, luminous strong, but the voltage is too high, the current flowing through the filament is too large, the filament will be burned out, and vice versa, the voltage is low, the luminous light is dark, but the bulb will not be damaged. will not damage the bulb.

As far as experience is concerned, a 12V bulb at a voltage of 10 - 14V is able to work properly, as is the case with bulbs used in cars and motorcycles.