Hikari is my best friend.

His eyes were gleaming.

Hikari is my best friend.

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?