裸はだか電でん球きゅう

noun

naked light bulb; bare light bulb

Refers to a light bulb without a shade or cover, often used in descriptions of simple or stark lighting.

• 部屋へやには裸はだか電でん球きゅうが一ひとつぶら下さがっていた。

  A single bare light bulb hung in the room.