Want The Light On? Not Without an A in Math
by Jaymi Heimbuch, San Francisco, California 
on 11.10.08
Photo via Yanko Design
A clever way to get someone to think twice about turning on the light is to require them to think before they’re even able to turn it on.
A concept design by Mingyu Jeung does exactly this.
You have to earn the ability to turn on this light by solving a randomly generated math problem. Working for your lighting is a great way to keep the brain young and the planet a little greener.
The light features a chalk board to help with the calculations. The only question is, how do you solve the problem in the dark…without a light?
Via Yanko Design
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That could be a quite messy if you have to go to the bathroom at 3:00 in the morning!