How do you find the power output of a light bulb?

To find the power output of a light bulb, you can use the formula ( P = V \times I ), where ( P ) is the power in watts, ( V ) is the voltage across the bulb in volts, and ( I ) is the current flowing through it in amperes. You can measure the voltage using a voltmeter and the current with an ammeter. Alternatively, if the bulb has a specified wattage rating (e.g., 60W), that value represents its power output directly.