The comments below have noted that this is like a solar tube or deck prism.
The communities who benefit from this idea live in areas where the houses hardly have windows and live in darkness even during daytime. Their solution up until this innovation was to turn on the light bulb and use electricity.
*PET soda bottle
*Galvanized Iron (GI) sheet
Step 1: Cut approximately 9 x 10 inches of GI sheet (corrugated or flat)
*Here is a how-to video