Which Fruits Can Power a Light Best from the Acidic Level in Them

Conclusion
From January 30th to March 30th I've been experimenting with a science project on "Can fruit produce enough electricity to light a light bulb". Through my experiment I have found out that a lemon produces the most amount of electricity ( .40 volts).
The banana and lime both had 25 volts. The fruit with the least amount of electricity was the grapefruit (.10 volts). When I finished my experiment I also found out that none of the fruits could actually light a light bulb.
If I did this project again I would use an LED light, clock, or calculator instead of a light bulb. Another thing I could try would be to compare vegetables to fruits. Fruit produces a small amount if current, not enough to light up a light bulb, even with multiple fruits attached together. Vegetables, especially potatoes, may have higher current than fruit.
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