A bulb is marked with pz220 100. In order to make the bulb work normally after being connected to the 330V circuit, what is the resistance in series or in parallel?

A bulb is marked with pz220 100. In order to make the bulb work normally after being connected to the 330V circuit, what is the resistance in series or in parallel?

First of all: PZ general lighting for short
220 rated voltage 220 V
100 rated power 100W
The calculated bulb resistance: Rd = u * U / P = 220 * 220 / 100 = 484 ohm;
A series resistance R is required. Because the power supply is 330, the voltage drop on the resistance is 110. According to the principle of voltage division, the resistance value of the resistance is 220 / 110 = rd / R
Therefore, series R = 242 ohm