Strangest World Surprises You Won’t Believe Are Real

A large city in the United States had a problem with thefts of light bulbs from its subway system. Thieves would unscrew the light bulbs, leading to cost and security issues. The engineer who was given this challenge could not alter the location of the light bulbs, and he had very little budget to work with, but he came up with a solution using  nonstandard cap - the thread is not clockwise as in conventional bulbs but counterclockwise.