noun
luminous paint
Paint that glows in the dark after being exposed to light. Used for safety signs, watch dials, and decorative purposes.
この時計の文字盤には夜光塗料が使われている。
Luminous paint is used on the dial of this watch.
非常口の標識に
If you apply luminous paint to emergency exit signs, they are easy to see even during a power outage.