The Water Model

Yes! That is, of course, the right answer. The higher the voltage of the battery, the brither shines the light bulb.

You now have learned that a light bulb emits more light at a higher voltage. Therefore, the power of the light bulb is high if the voltage is high.

What could further be responsible for the power of electric elements like a light bulb?
Another very important electrical quantity is amperage. Let's think now about what a higher amperage could mean in the water model.