Q. How can we light an AC with a LED bulb?

Answer

First of all we connect black anode of diode to negative of the led and then we connect the resistor to the positive of the LED. Next we use an LED of 5mm or 10 mm of any colour with a diode like 1N 4007. This is followed by a resistor of 2 watts or higher rating of value anywhere from 22 kilo ohms upto 100 kilo ohms. And finally we take a two pin male plug.