In this article I will tell you how you can lighten a led with lemon. It is very interesting and amazing way to lighten a led with lemon. Lemon is bearing citric acid which has a battery power. For this purpose you need a single green Lemon and one LED. Here one thing you must have to keep in your mind that only a green lemon can make electricity and a yellow lemon cannot produce such electricity which can lighten a led. If you cut the lemon in to two parts then it can also produce light. You can use your Lemon battery as a night light. And you can use this led light blub up to 5 days with one or half green lemon.