"This lighting for people who can't sleep without the light", the designer Yuko Taguchi said. Wind-Up Bedside Lamp is really cool. The key functions as a switch and a timer. The light will stay on until the key winds back. You can count how many times you need to wind-up. It runs off a high carbon tensile steel spring. As the spring unwinds, it powers a small electric generator, producing enough power to keep the light on.
