Red Factory Light (Purchased)

AC Unit (Purchased) is a base item available from the marketplace.

Obtained from

 * Industrial Research Pack

World Appearance

 * Ace Chemicals (Alert)
 * Knightsdome Arena
 * Old Gotham Subway
 * Oolong Island (Alert)

Trivia

 * Some world versions of this item are attached to ceilings instead of walls.