This main song is my favorite.

He showed his true colors under difficult circumstances.

He is a person who speaks the truth.

This room feels bright because it has enough luminous flux.

Mitsuko is my best friend.

Migihiro is my best friend.

In urban areas, light pollution makes it difficult to see the starry sky.

In urban areas, light pollution obscures the starry sky.

The sun's photosphere is very bright and can be seen from Earth.

How do I adjust the light level in this room?