When electricity flows to a light bulb , the light bulb will turn on.
An electric current is a flow of electric charge.
Electric currents can turn a lightbulb on.
What can turn a lightbulb on?

[1] Electric current
[2] cigarettes
[3] Shining a flashlight on it
[4] hydrogen and oxygen
[5] Unplugging the lamp
[6] direct energy
[7] Sunlight
[8] heat energy