Solar Battery + Room Lamp

Again I have absolutely no idea on how this would work, but it would be nice if there were a lamp which also works as a solar panel.
My idea is a half-spherical shape with two holes like these:

Solar Battery + Room Lamp

Solar Battery + Room Lamp

Solar Battery + Room Lamp

Solar Battery + Room Lamp

Solar Battery + Room Lamp

Solar Battery + Room Lamp

Solar Battery + Room Lamp

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