Photographer Caleb Charland shoots unusual pictures of fruits, vegetables, and other objects. These long-exposure shots feature alternative energy sources like apples, oranges, potatoes, vinegar, and coins.

DVICE reports that in the photo of the orange, light was created from the chemical reaction between the citric acid and galvanized nails, and it required 14 hours of exposure. Other photos in this ongoing project show light created by wiring apple trees and creating a battery through stacked coins. Click through to see the alternative energy photographs:

Caleb Charland