Well, Coke has nothing to do with it, really. It’s the empty liter bottle of Coke or any softdrinks that Mang Demi alias Demi “Solar” (for solar energy) uses to light up dark homes.
So far, as of this video taking, Demi Solar has used more than 640 plastic liter bottles to light up more than 640 rooms. And he plans to keep doing it. It almost costs his neighbors nothing to avail of his solar “bulb”–an empty plastic liter bottle, water, bleach liquid, some minor roof work, and solar energy from the sunlight.
How bright is it? Watch the video.