This might just be the best off-grid lighting that you will ever need. Mud and a splash of water here and there are all this lamp requires--two things that you can find almost anywhere. The only thing is that I am not sure how it will perform in subzero temperatures.
Designer Marieke Staps says, "The mud is enclosed in various cells. These cells contain copper and zinc that conduct the electricity." Therefore, the more cells you have, the more and/or brighter the light will be.