This Weve had some students do this project and then try to use the lemon battery to light a small flashlights light bulb. The lemons did not work. Why? The reason is that the lemons produce only a very small current about one milliamp. This is not enough electric current to light the bulb. Even with multiple lemons, the amount of current flowing through the wire is not enough. Though the voltage is high enough 1.5 volts with two lemons, the current is too weak. But it was a great experiment! Even if an experiment doesnt work, it helps us to understand how things work. Good work!!! -648 By knowing what to look for you can conduct your own home energy audit. Heres how to get started. "average home energy use kwh " and "how to build a paper windmill " (include "magnetic electricity generator for sale", "how stuff works solar power ", "gas turbine electricity generation ", "cost of residential solar power system ", "home energy monitor google ", "How to make a solar hot water system ", 4 Feb 2010 Investing to make your home more energy efficient may lower the bills, but it may not boost its price, partly because these investments & Electric power washer home depot )