The Dark Knight / light

Now there is a product to solve these problems. This product does not
at all require powered lights. It will use the refraction of the mirror,
so that the faint light irradiation enhances the brightness further afield
in order to protect the safety and convenience of the workers.
As workers enter the sewers, they will only need to bring flashlights
in order to illuminate the entire sewer. The flashlight will be placed here
and the flashlight will light up. The Dark Night will reflect more light.