He adjusted the light levels of the lamp to change the atmosphere of the room.

Visible light is the range of light visible to the human eye.

This lens is used for light concentration.

This lens is used to concentrate light.

Let's go to see a movie together.

I will turn twenty years old next year.

Our project is scheduled to be completed on the twentieth day of the month.

There is a two-story house.

What art thou doing?

Our project is scheduled to be completed on the twenty-second day of the month.