I often read/blog/youtube/watch movie in bed and fall asleep and forget to turn off the light. If you are like me, you may find this product useful =)
Wind-up to turn the light on before you go to bed. The light will stay on until the key winds back. You will come to know how many times you need to wind-up. Its main source of power comes from its powerful spring-driven generator. As the high carbon tensile steel spring unwinds, power is transferred to a small dynamo electric generator which produces enough electricity to power of the light.
Love it ! I can totally imagine myself using it. It will also be useful for people who can’t sleep without the light !