noun
reading light; reading lamp
A small lamp designed for reading, often placed on a desk or bedside table.
ベッドサイドに読書灯を置いている。
I keep a reading lamp by my bedside.
飛行機の座席には読書灯がついている。
Airplane seats are equipped with reading lights.
Compound of 読書 (reading) and 灯 (lamp, light).