Perfect for those that fall asleep with the light on while reading a book, this lamp requires a wind-up to turn on the light and will stay on till the key winds back. It functions as both a switch and timer, saving you from wasted electricity.
The source of power comes from a spring-driven generator.
As the high carbon tensile steel spring unwinds, power is transferred to a small dynamo electric generator to produce electricity to power the light.
Personal testing will help you determine how many times you need to wind-up the lamp. It’s also great to know that there is no need to worry about vampire power as the lamp doesn’t need to be plugged in.